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Finding the Fourth Proportional to 629,939.80, 944,909.70 and 393,743.80

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Solution

The fourth proportional to 629,939.80, 944,909.70 and 393,743.80 is: 590,615.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,939.80 : 944,909.70 = 393,743.80 : x
  2. Step 2: Convert to fraction form
    629,939.80/944,909.70 = 393,743.80/x
  3. Step 3: Cross multiply
    629,939.80x = 944,909.70 × 393,743.80
  4. Step 4: Simplify right side
    629,939.80x = 372,052,335,934.86
  5. Step 5: Solve for x
    x = 372,052,335,934.86/629,939.80
  6. Step 6: Final answer
    x = 590,615.70

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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.