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Finding the Fourth Proportional to 407,630.60, 611,445.90 and 274,920.20

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Solution

The fourth proportional to 407,630.60, 611,445.90 and 274,920.20 is: 412,380.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,630.60 : 611,445.90 = 274,920.20 : x
  2. Step 2: Convert to fraction form
    407,630.60/611,445.90 = 274,920.20/x
  3. Step 3: Cross multiply
    407,630.60x = 611,445.90 × 274,920.20
  4. Step 4: Simplify right side
    407,630.60x = 168,098,829,117.18
  5. Step 5: Solve for x
    x = 168,098,829,117.18/407,630.60
  6. Step 6: Final answer
    x = 412,380.30

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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.