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Finding the Fourth Proportional to 355.07, 532.48 and 123.90

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Solution

The fourth proportional to 355.07, 532.48 and 123.90 is: 185.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.07 : 532.48 = 123.90 : x
  2. Step 2: Convert to fraction form
    355.07/532.48 = 123.90/x
  3. Step 3: Cross multiply
    355.07x = 532.48 × 123.90
  4. Step 4: Simplify right side
    355.07x = 65,974.27
  5. Step 5: Solve for x
    x = 65,974.27/355.07
  6. Step 6: Final answer
    x = 185.81

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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.