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Finding the Fourth Proportional to 240.50, 360.80 and 86.44

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Solution

The fourth proportional to 240.50, 360.80 and 86.44 is: 129.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.50 : 360.80 = 86.44 : x
  2. Step 2: Convert to fraction form
    240.50/360.80 = 86.44/x
  3. Step 3: Cross multiply
    240.50x = 360.80 × 86.44
  4. Step 4: Simplify right side
    240.50x = 31,188.72
  5. Step 5: Solve for x
    x = 31,188.72/240.50
  6. Step 6: Final answer
    x = 129.68

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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.