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Finding the Fourth Proportional to 629,670.10, 944,505.15 and 405,721.30

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Solution

The fourth proportional to 629,670.10, 944,505.15 and 405,721.30 is: 608,581.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,670.10 : 944,505.15 = 405,721.30 : x
  2. Step 2: Convert to fraction form
    629,670.10/944,505.15 = 405,721.30/x
  3. Step 3: Cross multiply
    629,670.10x = 944,505.15 × 405,721.30
  4. Step 4: Simplify right side
    629,670.10x = 383,205,857,314.70
  5. Step 5: Solve for x
    x = 383,205,857,314.70/629,670.10
  6. Step 6: Final answer
    x = 608,581.95

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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.