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Finding the Fourth Proportional to 256,811.87, 385,270.35 and 88,310.31

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Solution

The fourth proportional to 256,811.87, 385,270.35 and 88,310.31 is: 132,483.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,811.87 : 385,270.35 = 88,310.31 : x
  2. Step 2: Convert to fraction form
    256,811.87/385,270.35 = 88,310.31/x
  3. Step 3: Cross multiply
    256,811.87x = 385,270.35 × 88,310.31
  4. Step 4: Simplify right side
    256,811.87x = 34,023,342,266.38
  5. Step 5: Solve for x
    x = 34,023,342,266.38/256,811.87
  6. Step 6: Final answer
    x = 132,483.53

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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.