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Finding the Fourth Proportional to 395,613.60, 593,420.40 and 129,309.90

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Solution

The fourth proportional to 395,613.60, 593,420.40 and 129,309.90 is: 193,964.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,613.60 : 593,420.40 = 129,309.90 : x
  2. Step 2: Convert to fraction form
    395,613.60/593,420.40 = 129,309.90/x
  3. Step 3: Cross multiply
    395,613.60x = 593,420.40 × 129,309.90
  4. Step 4: Simplify right side
    395,613.60x = 76,735,132,581.96
  5. Step 5: Solve for x
    x = 76,735,132,581.96/395,613.60
  6. Step 6: Final answer
    x = 193,964.85

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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.