Home / 1,287,780.48-1,777,143.93-804,625.83

Finding the Fourth Proportional to 1,287,780.48, 1,777,143.93 and 804,625.83

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Solution

The fourth proportional to 1,287,780.48, 1,777,143.93 and 804,625.83 is: 1,110,387.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,780.48 : 1,777,143.93 = 804,625.83 : x
  2. Step 2: Convert to fraction form
    1,287,780.48/1,777,143.93 = 804,625.83/x
  3. Step 3: Cross multiply
    1,287,780.48x = 1,777,143.93 × 804,625.83
  4. Step 4: Simplify right side
    1,287,780.48x = 1,429,935,909,705.71
  5. Step 5: Solve for x
    x = 1,429,935,909,705.71/1,287,780.48
  6. Step 6: Final answer
    x = 1,110,387.94

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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.