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Finding the Fourth Proportional to 629,938.80, 944,908.20 and 393,742.80

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Solution

The fourth proportional to 629,938.80, 944,908.20 and 393,742.80 is: 590,614.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,938.80 : 944,908.20 = 393,742.80 : x
  2. Step 2: Convert to fraction form
    629,938.80/944,908.20 = 393,742.80/x
  3. Step 3: Cross multiply
    629,938.80x = 944,908.20 × 393,742.80
  4. Step 4: Simplify right side
    629,938.80x = 372,050,800,410.96
  5. Step 5: Solve for x
    x = 372,050,800,410.96/629,938.80
  6. Step 6: Final answer
    x = 590,614.20

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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.