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Finding the Fourth Proportional to 399,114.90, 598,672.35 and 391,241.70

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Solution

The fourth proportional to 399,114.90, 598,672.35 and 391,241.70 is: 586,862.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,114.90 : 598,672.35 = 391,241.70 : x
  2. Step 2: Convert to fraction form
    399,114.90/598,672.35 = 391,241.70/x
  3. Step 3: Cross multiply
    399,114.90x = 598,672.35 × 391,241.70
  4. Step 4: Simplify right side
    399,114.90x = 234,225,587,957.00
  5. Step 5: Solve for x
    x = 234,225,587,957.00/399,114.90
  6. Step 6: Final answer
    x = 586,862.55

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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.