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Finding the Fourth Proportional to 256,485.10, 384,691.20 and 88,013.20

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Solution

The fourth proportional to 256,485.10, 384,691.20 and 88,013.20 is: 132,007.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,485.10 : 384,691.20 = 88,013.20 : x
  2. Step 2: Convert to fraction form
    256,485.10/384,691.20 = 88,013.20/x
  3. Step 3: Cross multiply
    256,485.10x = 384,691.20 × 88,013.20
  4. Step 4: Simplify right side
    256,485.10x = 33,857,903,523.84
  5. Step 5: Solve for x
    x = 33,857,903,523.84/256,485.10
  6. Step 6: Final answer
    x = 132,007.29

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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.