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Finding the Fourth Proportional to 399,398.27, 599,181.57 and 129,505.37

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Solution

The fourth proportional to 399,398.27, 599,181.57 and 129,505.37 is: 194,285.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,398.27 : 599,181.57 = 129,505.37 : x
  2. Step 2: Convert to fraction form
    399,398.27/599,181.57 = 129,505.37/x
  3. Step 3: Cross multiply
    399,398.27x = 599,181.57 × 129,505.37
  4. Step 4: Simplify right side
    399,398.27x = 77,597,230,920.03
  5. Step 5: Solve for x
    x = 77,597,230,920.03/399,398.27
  6. Step 6: Final answer
    x = 194,285.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.