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Finding the Fourth Proportional to 681.14, 939.38 and 588.80

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Solution

The fourth proportional to 681.14, 939.38 and 588.80 is: 812.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.14 : 939.38 = 588.80 : x
  2. Step 2: Convert to fraction form
    681.14/939.38 = 588.80/x
  3. Step 3: Cross multiply
    681.14x = 939.38 × 588.80
  4. Step 4: Simplify right side
    681.14x = 553,099.30
  5. Step 5: Solve for x
    x = 553,099.30/681.14
  6. Step 6: Final answer
    x = 812.03

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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.