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Finding the Fourth Proportional to 699,298.47, 965,003.85 and 393,380.91

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Solution

The fourth proportional to 699,298.47, 965,003.85 and 393,380.91 is: 542,849.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,298.47 : 965,003.85 = 393,380.91 : x
  2. Step 2: Convert to fraction form
    699,298.47/965,003.85 = 393,380.91/x
  3. Step 3: Cross multiply
    699,298.47x = 965,003.85 × 393,380.91
  4. Step 4: Simplify right side
    699,298.47x = 379,614,092,666.50
  5. Step 5: Solve for x
    x = 379,614,092,666.50/699,298.47
  6. Step 6: Final answer
    x = 542,849.88

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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.