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Finding the Fourth Proportional to 658,847.40, 988,271.10 and 392,470.80

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Solution

The fourth proportional to 658,847.40, 988,271.10 and 392,470.80 is: 588,706.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,847.40 : 988,271.10 = 392,470.80 : x
  2. Step 2: Convert to fraction form
    658,847.40/988,271.10 = 392,470.80/x
  3. Step 3: Cross multiply
    658,847.40x = 988,271.10 × 392,470.80
  4. Step 4: Simplify right side
    658,847.40x = 387,867,549,233.88
  5. Step 5: Solve for x
    x = 387,867,549,233.88/658,847.40
  6. Step 6: Final answer
    x = 588,706.20

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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.