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Finding the Fourth Proportional to 449,461.60, 620,344.20 and 288,520.24

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Solution

The fourth proportional to 449,461.60, 620,344.20 and 288,520.24 is: 398,213.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,461.60 : 620,344.20 = 288,520.24 : x
  2. Step 2: Convert to fraction form
    449,461.60/620,344.20 = 288,520.24/x
  3. Step 3: Cross multiply
    449,461.60x = 620,344.20 × 288,520.24
  4. Step 4: Simplify right side
    449,461.60x = 178,981,857,466.61
  5. Step 5: Solve for x
    x = 178,981,857,466.61/449,461.60
  6. Step 6: Final answer
    x = 398,213.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.