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Finding the Fourth Proportional to 360.48, 540.55 and 165.42

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Solution

The fourth proportional to 360.48, 540.55 and 165.42 is: 248.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.48 : 540.55 = 165.42 : x
  2. Step 2: Convert to fraction form
    360.48/540.55 = 165.42/x
  3. Step 3: Cross multiply
    360.48x = 540.55 × 165.42
  4. Step 4: Simplify right side
    360.48x = 89,417.78
  5. Step 5: Solve for x
    x = 89,417.78/360.48
  6. Step 6: Final answer
    x = 248.05

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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.