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Finding the Fourth Proportional to 256,921.68, 385,286.76 and 88,394.88

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Solution

The fourth proportional to 256,921.68, 385,286.76 and 88,394.88 is: 132,559.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,921.68 : 385,286.76 = 88,394.88 : x
  2. Step 2: Convert to fraction form
    256,921.68/385,286.76 = 88,394.88/x
  3. Step 3: Cross multiply
    256,921.68x = 385,286.76 × 88,394.88
  4. Step 4: Simplify right side
    256,921.68x = 34,057,376,915.79
  5. Step 5: Solve for x
    x = 34,057,376,915.79/256,921.68
  6. Step 6: Final answer
    x = 132,559.37

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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.