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Finding the Fourth Proportional to 409,695.20, 615,003.60 and 316,613.60

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Solution

The fourth proportional to 409,695.20, 615,003.60 and 316,613.60 is: 475,276.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,695.20 : 615,003.60 = 316,613.60 : x
  2. Step 2: Convert to fraction form
    409,695.20/615,003.60 = 316,613.60/x
  3. Step 3: Cross multiply
    409,695.20x = 615,003.60 × 316,613.60
  4. Step 4: Simplify right side
    409,695.20x = 194,718,503,808.96
  5. Step 5: Solve for x
    x = 194,718,503,808.96/409,695.20
  6. Step 6: Final answer
    x = 475,276.51

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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.