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Finding the Fourth Proportional to 629,912,964.20, 944,869,446.30 and 499,816,207.40

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Solution

The fourth proportional to 629,912,964.20, 944,869,446.30 and 499,816,207.40 is: 749,724,311.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,912,964.20 : 944,869,446.30 = 499,816,207.40 : x
  2. Step 2: Convert to fraction form
    629,912,964.20/944,869,446.30 = 499,816,207.40/x
  3. Step 3: Cross multiply
    629,912,964.20x = 944,869,446.30 × 499,816,207.40
  4. Step 4: Simplify right side
    629,912,964.20x = 472,261,063,137,803,904
  5. Step 5: Solve for x
    x = 472,261,063,137,803,904/629,912,964.20
  6. Step 6: Final answer
    x = 749,724,311.10

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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.