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Finding the Fourth Proportional to 360.61, 541.01 and 129.56

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Solution

The fourth proportional to 360.61, 541.01 and 129.56 is: 194.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.61 : 541.01 = 129.56 : x
  2. Step 2: Convert to fraction form
    360.61/541.01 = 129.56/x
  3. Step 3: Cross multiply
    360.61x = 541.01 × 129.56
  4. Step 4: Simplify right side
    360.61x = 70,090.87
  5. Step 5: Solve for x
    x = 70,090.87/360.61
  6. Step 6: Final answer
    x = 194.37

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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.