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Finding the Fourth Proportional to 360.66, 537.23 and 321.78

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Solution

The fourth proportional to 360.66, 537.23 and 321.78 is: 479.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.66 : 537.23 = 321.78 : x
  2. Step 2: Convert to fraction form
    360.66/537.23 = 321.78/x
  3. Step 3: Cross multiply
    360.66x = 537.23 × 321.78
  4. Step 4: Simplify right side
    360.66x = 172,868.26
  5. Step 5: Solve for x
    x = 172,868.26/360.66
  6. Step 6: Final answer
    x = 479.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.