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Finding the Fourth Proportional to 709,945.04, 979,728.90 and 387,657.38

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Solution

The fourth proportional to 709,945.04, 979,728.90 and 387,657.38 is: 534,969.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,945.04 : 979,728.90 = 387,657.38 : x
  2. Step 2: Convert to fraction form
    709,945.04/979,728.90 = 387,657.38/x
  3. Step 3: Cross multiply
    709,945.04x = 979,728.90 × 387,657.38
  4. Step 4: Simplify right side
    709,945.04x = 379,799,138,484.28
  5. Step 5: Solve for x
    x = 379,799,138,484.28/709,945.04
  6. Step 6: Final answer
    x = 534,969.78

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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.