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Finding the Fourth Proportional to 285,456.12, 428,193.90 and 135,619.08

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Solution

The fourth proportional to 285,456.12, 428,193.90 and 135,619.08 is: 203,433.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,456.12 : 428,193.90 = 135,619.08 : x
  2. Step 2: Convert to fraction form
    285,456.12/428,193.90 = 135,619.08/x
  3. Step 3: Cross multiply
    285,456.12x = 428,193.90 × 135,619.08
  4. Step 4: Simplify right side
    285,456.12x = 58,071,262,779.61
  5. Step 5: Solve for x
    x = 58,071,262,779.61/285,456.12
  6. Step 6: Final answer
    x = 203,433.24

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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.