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Finding the Fourth Proportional to 415,312.38, 623,113.05 and 131,046.78

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Solution

The fourth proportional to 415,312.38, 623,113.05 and 131,046.78 is: 196,615.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,312.38 : 623,113.05 = 131,046.78 : x
  2. Step 2: Convert to fraction form
    415,312.38/623,113.05 = 131,046.78/x
  3. Step 3: Cross multiply
    415,312.38x = 623,113.05 × 131,046.78
  4. Step 4: Simplify right side
    415,312.38x = 81,656,958,778.48
  5. Step 5: Solve for x
    x = 81,656,958,778.48/415,312.38
  6. Step 6: Final answer
    x = 196,615.76

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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.