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Finding the Fourth Proportional to 360.89, 541.31 and 100.90

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Solution

The fourth proportional to 360.89, 541.31 and 100.90 is: 151.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.89 : 541.31 = 100.90 : x
  2. Step 2: Convert to fraction form
    360.89/541.31 = 100.90/x
  3. Step 3: Cross multiply
    360.89x = 541.31 × 100.90
  4. Step 4: Simplify right side
    360.89x = 54,617.11
  5. Step 5: Solve for x
    x = 54,617.11/360.89
  6. Step 6: Final answer
    x = 151.34

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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.