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Finding the Fourth Proportional to 539.31, 808.90 and 331.02

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Solution

The fourth proportional to 539.31, 808.90 and 331.02 is: 496.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.31 : 808.90 = 331.02 : x
  2. Step 2: Convert to fraction form
    539.31/808.90 = 331.02/x
  3. Step 3: Cross multiply
    539.31x = 808.90 × 331.02
  4. Step 4: Simplify right side
    539.31x = 267,762.08
  5. Step 5: Solve for x
    x = 267,762.08/539.31
  6. Step 6: Final answer
    x = 496.49

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Similar ratio
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1.5x scale

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.