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Finding the Fourth Proportional to 285,314.97, 393,729.87 and 157,987.83

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Solution

The fourth proportional to 285,314.97, 393,729.87 and 157,987.83 is: 218,020.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,314.97 : 393,729.87 = 157,987.83 : x
  2. Step 2: Convert to fraction form
    285,314.97/393,729.87 = 157,987.83/x
  3. Step 3: Cross multiply
    285,314.97x = 393,729.87 × 157,987.83
  4. Step 4: Simplify right side
    285,314.97x = 62,204,527,767.48
  5. Step 5: Solve for x
    x = 62,204,527,767.48/285,314.97
  6. Step 6: Final answer
    x = 218,020.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.