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Finding the Fourth Proportional to 629,976.60, 944,964.90 and 417,400.20

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Solution

The fourth proportional to 629,976.60, 944,964.90 and 417,400.20 is: 626,100.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,976.60 : 944,964.90 = 417,400.20 : x
  2. Step 2: Convert to fraction form
    629,976.60/944,964.90 = 417,400.20/x
  3. Step 3: Cross multiply
    629,976.60x = 944,964.90 × 417,400.20
  4. Step 4: Simplify right side
    629,976.60x = 394,428,538,252.98
  5. Step 5: Solve for x
    x = 394,428,538,252.98/629,976.60
  6. Step 6: Final answer
    x = 626,100.30

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Double scale
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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.