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Finding the Fourth Proportional to 287,773.80, 431,660.70 and 271,444.20

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Solution

The fourth proportional to 287,773.80, 431,660.70 and 271,444.20 is: 407,166.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,773.80 : 431,660.70 = 271,444.20 : x
  2. Step 2: Convert to fraction form
    287,773.80/431,660.70 = 271,444.20/x
  3. Step 3: Cross multiply
    287,773.80x = 431,660.70 × 271,444.20
  4. Step 4: Simplify right side
    287,773.80x = 117,171,793,382.94
  5. Step 5: Solve for x
    x = 117,171,793,382.94/287,773.80
  6. Step 6: Final answer
    x = 407,166.30

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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.