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Finding the Fourth Proportional to 256,787.32, 385,189.48 and 88,305.96

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Solution

The fourth proportional to 256,787.32, 385,189.48 and 88,305.96 is: 132,461.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,787.32 : 385,189.48 = 88,305.96 : x
  2. Step 2: Convert to fraction form
    256,787.32/385,189.48 = 88,305.96/x
  3. Step 3: Cross multiply
    256,787.32x = 385,189.48 × 88,305.96
  4. Step 4: Simplify right side
    256,787.32x = 34,014,526,813.30
  5. Step 5: Solve for x
    x = 34,014,526,813.30/256,787.32
  6. Step 6: Final answer
    x = 132,461.86

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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.