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Finding the Fourth Proportional to 215,680.60, 323,520.90 and 185,613.40

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Solution

The fourth proportional to 215,680.60, 323,520.90 and 185,613.40 is: 278,420.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,680.60 : 323,520.90 = 185,613.40 : x
  2. Step 2: Convert to fraction form
    215,680.60/323,520.90 = 185,613.40/x
  3. Step 3: Cross multiply
    215,680.60x = 323,520.90 × 185,613.40
  4. Step 4: Simplify right side
    215,680.60x = 60,049,814,220.06
  5. Step 5: Solve for x
    x = 60,049,814,220.06/215,680.60
  6. Step 6: Final answer
    x = 278,420.10

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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.