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Finding the Fourth Proportional to 629,748.60, 944,622.90 and 405,799.80

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Solution

The fourth proportional to 629,748.60, 944,622.90 and 405,799.80 is: 608,699.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,748.60 : 944,622.90 = 405,799.80 : x
  2. Step 2: Convert to fraction form
    629,748.60/944,622.90 = 405,799.80/x
  3. Step 3: Cross multiply
    629,748.60x = 944,622.90 × 405,799.80
  4. Step 4: Simplify right side
    629,748.60x = 383,327,783,895.42
  5. Step 5: Solve for x
    x = 383,327,783,895.42/629,748.60
  6. Step 6: Final answer
    x = 608,699.70

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Half scale
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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.