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Finding the Fourth Proportional to 399,234.34, 598,945.90 and 129,362.04

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Solution

The fourth proportional to 399,234.34, 598,945.90 and 129,362.04 is: 194,073.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,234.34 : 598,945.90 = 129,362.04 : x
  2. Step 2: Convert to fraction form
    399,234.34/598,945.90 = 129,362.04/x
  3. Step 3: Cross multiply
    399,234.34x = 598,945.90 × 129,362.04
  4. Step 4: Simplify right side
    399,234.34x = 77,480,863,473.64
  5. Step 5: Solve for x
    x = 77,480,863,473.64/399,234.34
  6. Step 6: Final answer
    x = 194,073.64

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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.