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Finding the Fourth Proportional to 240.36, 360.54 and 86.29

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Solution

The fourth proportional to 240.36, 360.54 and 86.29 is: 129.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.36 : 360.54 = 86.29 : x
  2. Step 2: Convert to fraction form
    240.36/360.54 = 86.29/x
  3. Step 3: Cross multiply
    240.36x = 360.54 × 86.29
  4. Step 4: Simplify right side
    240.36x = 31,112.12
  5. Step 5: Solve for x
    x = 31,112.12/240.36
  6. Step 6: Final answer
    x = 129.44

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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.