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Finding the Fourth Proportional to 709,948.09, 979,729.60 and 387,651.32

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Solution

The fourth proportional to 709,948.09, 979,729.60 and 387,651.32 is: 534,959.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,948.09 : 979,729.60 = 387,651.32 : x
  2. Step 2: Convert to fraction form
    709,948.09/979,729.60 = 387,651.32/x
  3. Step 3: Cross multiply
    709,948.09x = 979,729.60 × 387,651.32
  4. Step 4: Simplify right side
    709,948.09x = 379,793,472,306.40
  5. Step 5: Solve for x
    x = 379,793,472,306.40/709,948.09
  6. Step 6: Final answer
    x = 534,959.49

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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.