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Finding the Fourth Proportional to 285,346.80, 428,195.16 and 127,708.56

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Solution

The fourth proportional to 285,346.80, 428,195.16 and 127,708.56 is: 191,641.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,346.80 : 428,195.16 = 127,708.56 : x
  2. Step 2: Convert to fraction form
    285,346.80/428,195.16 = 127,708.56/x
  3. Step 3: Cross multiply
    285,346.80x = 428,195.16 × 127,708.56
  4. Step 4: Simplify right side
    285,346.80x = 54,684,187,282.57
  5. Step 5: Solve for x
    x = 54,684,187,282.57/285,346.80
  6. Step 6: Final answer
    x = 191,641.14

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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.