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Finding the Fourth Proportional to 647,630.80, 971,446.20 and 253,646.80

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Solution

The fourth proportional to 647,630.80, 971,446.20 and 253,646.80 is: 380,470.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,630.80 : 971,446.20 = 253,646.80 : x
  2. Step 2: Convert to fraction form
    647,630.80/971,446.20 = 253,646.80/x
  3. Step 3: Cross multiply
    647,630.80x = 971,446.20 × 253,646.80
  4. Step 4: Simplify right side
    647,630.80x = 246,404,220,002.16
  5. Step 5: Solve for x
    x = 246,404,220,002.16/647,630.80
  6. Step 6: Final answer
    x = 380,470.20

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Similar ratio
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1.5x scale

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.