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Finding the Fourth Proportional to 256,921.20, 384,798.60 and 132,116.40

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Solution

The fourth proportional to 256,921.20, 384,798.60 and 132,116.40 is: 197,874.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,921.20 : 384,798.60 = 132,116.40 : x
  2. Step 2: Convert to fraction form
    256,921.20/384,798.60 = 132,116.40/x
  3. Step 3: Cross multiply
    256,921.20x = 384,798.60 × 132,116.40
  4. Step 4: Simplify right side
    256,921.20x = 50,838,205,757.04
  5. Step 5: Solve for x
    x = 50,838,205,757.04/256,921.20
  6. Step 6: Final answer
    x = 197,874.70

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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.