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Finding the Fourth Proportional to 261.08, 391.36 and 124.02

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Solution

The fourth proportional to 261.08, 391.36 and 124.02 is: 185.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.08 : 391.36 = 124.02 : x
  2. Step 2: Convert to fraction form
    261.08/391.36 = 124.02/x
  3. Step 3: Cross multiply
    261.08x = 391.36 × 124.02
  4. Step 4: Simplify right side
    261.08x = 48,536.47
  5. Step 5: Solve for x
    x = 48,536.47/261.08
  6. Step 6: Final answer
    x = 185.91

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.