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Finding the Fourth Proportional to 360.33, 540.51 and 143.91

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Solution

The fourth proportional to 360.33, 540.51 and 143.91 is: 215.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.33 : 540.51 = 143.91 : x
  2. Step 2: Convert to fraction form
    360.33/540.51 = 143.91/x
  3. Step 3: Cross multiply
    360.33x = 540.51 × 143.91
  4. Step 4: Simplify right side
    360.33x = 77,784.79
  5. Step 5: Solve for x
    x = 77,784.79/360.33
  6. Step 6: Final answer
    x = 215.87

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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.