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Finding the Fourth Proportional to 709,874.72, 979,599.12 and 387,598.40

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Solution

The fourth proportional to 709,874.72, 979,599.12 and 387,598.40 is: 534,870.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,874.72 : 979,599.12 = 387,598.40 : x
  2. Step 2: Convert to fraction form
    709,874.72/979,599.12 = 387,598.40/x
  3. Step 3: Cross multiply
    709,874.72x = 979,599.12 × 387,598.40
  4. Step 4: Simplify right side
    709,874.72x = 379,691,051,553.41
  5. Step 5: Solve for x
    x = 379,691,051,553.41/709,874.72
  6. Step 6: Final answer
    x = 534,870.51

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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.