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Finding the Fourth Proportional to 392,638.70, 588,958.05 and 366,200.30

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Solution

The fourth proportional to 392,638.70, 588,958.05 and 366,200.30 is: 549,300.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,638.70 : 588,958.05 = 366,200.30 : x
  2. Step 2: Convert to fraction form
    392,638.70/588,958.05 = 366,200.30/x
  3. Step 3: Cross multiply
    392,638.70x = 588,958.05 × 366,200.30
  4. Step 4: Simplify right side
    392,638.70x = 215,676,614,597.42
  5. Step 5: Solve for x
    x = 215,676,614,597.42/392,638.70
  6. Step 6: Final answer
    x = 549,300.45

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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.