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Finding the Fourth Proportional to 778,854.40, 1,091,970.80 and 778,854.40

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Solution

The fourth proportional to 778,854.40, 1,091,970.80 and 778,854.40 is: 1,091,970.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,854.40 : 1,091,970.80 = 778,854.40 : x
  2. Step 2: Convert to fraction form
    778,854.40/1,091,970.80 = 778,854.40/x
  3. Step 3: Cross multiply
    778,854.40x = 1,091,970.80 × 778,854.40
  4. Step 4: Simplify right side
    778,854.40x = 850,486,262,251.52
  5. Step 5: Solve for x
    x = 850,486,262,251.52/778,854.40
  6. Step 6: Final answer
    x = 1,091,970.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.