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Finding the Fourth Proportional to 531.61, 733.63 and 321.79

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Solution

The fourth proportional to 531.61, 733.63 and 321.79 is: 444.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.61 : 733.63 = 321.79 : x
  2. Step 2: Convert to fraction form
    531.61/733.63 = 321.79/x
  3. Step 3: Cross multiply
    531.61x = 733.63 × 321.79
  4. Step 4: Simplify right side
    531.61x = 236,074.80
  5. Step 5: Solve for x
    x = 236,074.80/531.61
  6. Step 6: Final answer
    x = 444.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.