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Finding the Fourth Proportional to 523.97, 785.95 and 139.22

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Solution

The fourth proportional to 523.97, 785.95 and 139.22 is: 208.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.97 : 785.95 = 139.22 : x
  2. Step 2: Convert to fraction form
    523.97/785.95 = 139.22/x
  3. Step 3: Cross multiply
    523.97x = 785.95 × 139.22
  4. Step 4: Simplify right side
    523.97x = 109,419.41
  5. Step 5: Solve for x
    x = 109,419.41/523.97
  6. Step 6: Final answer
    x = 208.83

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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.