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Finding the Fourth Proportional to 457,249.80, 685,874.70 and 141,738.60

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Solution

The fourth proportional to 457,249.80, 685,874.70 and 141,738.60 is: 212,607.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,249.80 : 685,874.70 = 141,738.60 : x
  2. Step 2: Convert to fraction form
    457,249.80/685,874.70 = 141,738.60/x
  3. Step 3: Cross multiply
    457,249.80x = 685,874.70 × 141,738.60
  4. Step 4: Simplify right side
    457,249.80x = 97,214,919,753.42
  5. Step 5: Solve for x
    x = 97,214,919,753.42/457,249.80
  6. Step 6: Final answer
    x = 212,607.90

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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.