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Finding the Fourth Proportional to 1,287,724,804.52, 1,777,445,594.96 and 752,020,972.92

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Solution

The fourth proportional to 1,287,724,804.52, 1,777,445,594.96 and 752,020,972.92 is: 1,038,013,992.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,724,804.52 : 1,777,445,594.96 = 752,020,972.92 : x
  2. Step 2: Convert to fraction form
    1,287,724,804.52/1,777,445,594.96 = 752,020,972.92/x
  3. Step 3: Cross multiply
    1,287,724,804.52x = 1,777,445,594.96 × 752,020,972.92
  4. Step 4: Simplify right side
    1,287,724,804.52x = 1,336,676,365,634,187,520
  5. Step 5: Solve for x
    x = 1,336,676,365,634,187,520/1,287,724,804.52
  6. Step 6: Final answer
    x = 1,038,013,992.54

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Double scale
Find fourth proportional to 1,287,724,805.52, 1,777,445,596.34 and 752,020,973.92
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.