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Finding the Fourth Proportional to 285,617.80, 428,232.30 and 135,929.80

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Solution

The fourth proportional to 285,617.80, 428,232.30 and 135,929.80 is: 203,802.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,617.80 : 428,232.30 = 135,929.80 : x
  2. Step 2: Convert to fraction form
    285,617.80/428,232.30 = 135,929.80/x
  3. Step 3: Cross multiply
    285,617.80x = 428,232.30 × 135,929.80
  4. Step 4: Simplify right side
    285,617.80x = 58,209,530,892.54
  5. Step 5: Solve for x
    x = 58,209,530,892.54/285,617.80
  6. Step 6: Final answer
    x = 203,802.18

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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.