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Finding the Fourth Proportional to 287,572.80, 431,359.20 and 181,284.60

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Solution

The fourth proportional to 287,572.80, 431,359.20 and 181,284.60 is: 271,926.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,572.80 : 431,359.20 = 181,284.60 : x
  2. Step 2: Convert to fraction form
    287,572.80/431,359.20 = 181,284.60/x
  3. Step 3: Cross multiply
    287,572.80x = 431,359.20 × 181,284.60
  4. Step 4: Simplify right side
    287,572.80x = 78,198,780,028.32
  5. Step 5: Solve for x
    x = 78,198,780,028.32/287,572.80
  6. Step 6: Final answer
    x = 271,926.90

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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.