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Finding the Fourth Proportional to 709,926.08, 979,700.04 and 387,638.96

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Solution

The fourth proportional to 709,926.08, 979,700.04 and 387,638.96 is: 534,942.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,926.08 : 979,700.04 = 387,638.96 : x
  2. Step 2: Convert to fraction form
    709,926.08/979,700.04 = 387,638.96/x
  3. Step 3: Cross multiply
    709,926.08x = 979,700.04 × 387,638.96
  4. Step 4: Simplify right side
    709,926.08x = 379,769,904,617.56
  5. Step 5: Solve for x
    x = 379,769,904,617.56/709,926.08
  6. Step 6: Final answer
    x = 534,942.88

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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.