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Finding the Fourth Proportional to 287,842.60, 431,375.10 and 254,405.80

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Solution

The fourth proportional to 287,842.60, 431,375.10 and 254,405.80 is: 381,265.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,842.60 : 431,375.10 = 254,405.80 : x
  2. Step 2: Convert to fraction form
    287,842.60/431,375.10 = 254,405.80/x
  3. Step 3: Cross multiply
    287,842.60x = 431,375.10 × 254,405.80
  4. Step 4: Simplify right side
    287,842.60x = 109,744,327,415.58
  5. Step 5: Solve for x
    x = 109,744,327,415.58/287,842.60
  6. Step 6: Final answer
    x = 381,265.06

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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.