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Finding the Fourth Proportional to 399,148.68, 598,818.70 and 132,911.60

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Solution

The fourth proportional to 399,148.68, 598,818.70 and 132,911.60 is: 199,399.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,148.68 : 598,818.70 = 132,911.60 : x
  2. Step 2: Convert to fraction form
    399,148.68/598,818.70 = 132,911.60/x
  3. Step 3: Cross multiply
    399,148.68x = 598,818.70 × 132,911.60
  4. Step 4: Simplify right side
    399,148.68x = 79,589,951,526.92
  5. Step 5: Solve for x
    x = 79,589,951,526.92/399,148.68
  6. Step 6: Final answer
    x = 199,399.26

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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.