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Finding the Fourth Proportional to 256,872.10, 385,308.15 and 132,456.10

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Solution

The fourth proportional to 256,872.10, 385,308.15 and 132,456.10 is: 198,684.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,872.10 : 385,308.15 = 132,456.10 : x
  2. Step 2: Convert to fraction form
    256,872.10/385,308.15 = 132,456.10/x
  3. Step 3: Cross multiply
    256,872.10x = 385,308.15 × 132,456.10
  4. Step 4: Simplify right side
    256,872.10x = 51,036,414,847.22
  5. Step 5: Solve for x
    x = 51,036,414,847.22/256,872.10
  6. Step 6: Final answer
    x = 198,684.15

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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.