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Finding the Fourth Proportional to 709,892.67, 979,644.47 and 387,601.77

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Solution

The fourth proportional to 709,892.67, 979,644.47 and 387,601.77 is: 534,886.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,892.67 : 979,644.47 = 387,601.77 : x
  2. Step 2: Convert to fraction form
    709,892.67/979,644.47 = 387,601.77/x
  3. Step 3: Cross multiply
    709,892.67x = 979,644.47 × 387,601.77
  4. Step 4: Simplify right side
    709,892.67x = 379,711,928,604.70
  5. Step 5: Solve for x
    x = 379,711,928,604.70/709,892.67
  6. Step 6: Final answer
    x = 534,886.39

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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.