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Finding the Fourth Proportional to 287,616.20, 431,510.70 and 204,672.20

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Solution

The fourth proportional to 287,616.20, 431,510.70 and 204,672.20 is: 307,069.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,616.20 : 431,510.70 = 204,672.20 : x
  2. Step 2: Convert to fraction form
    287,616.20/431,510.70 = 204,672.20/x
  3. Step 3: Cross multiply
    287,616.20x = 431,510.70 × 204,672.20
  4. Step 4: Simplify right side
    287,616.20x = 88,318,244,292.54
  5. Step 5: Solve for x
    x = 88,318,244,292.54/287,616.20
  6. Step 6: Final answer
    x = 307,069.78

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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.