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Finding the Fourth Proportional to 278,755.28, 384,685.56 and 151,432.88

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Solution

The fourth proportional to 278,755.28, 384,685.56 and 151,432.88 is: 208,979.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,755.28 : 384,685.56 = 151,432.88 : x
  2. Step 2: Convert to fraction form
    278,755.28/384,685.56 = 151,432.88/x
  3. Step 3: Cross multiply
    278,755.28x = 384,685.56 × 151,432.88
  4. Step 4: Simplify right side
    278,755.28x = 58,254,042,245.21
  5. Step 5: Solve for x
    x = 58,254,042,245.21/278,755.28
  6. Step 6: Final answer
    x = 208,979.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.