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Finding the Fourth Proportional to 285,330.74, 428,079.42 and 127,522.28

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Solution

The fourth proportional to 285,330.74, 428,079.42 and 127,522.28 is: 191,320.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,330.74 : 428,079.42 = 127,522.28 : x
  2. Step 2: Convert to fraction form
    285,330.74/428,079.42 = 127,522.28/x
  3. Step 3: Cross multiply
    285,330.74x = 428,079.42 × 127,522.28
  4. Step 4: Simplify right side
    285,330.74x = 54,589,664,729.68
  5. Step 5: Solve for x
    x = 54,589,664,729.68/285,330.74
  6. Step 6: Final answer
    x = 191,320.66

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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.