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Finding the Fourth Proportional to 539.46, 809.50 and 231.30

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Solution

The fourth proportional to 539.46, 809.50 and 231.30 is: 347.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.46 : 809.50 = 231.30 : x
  2. Step 2: Convert to fraction form
    539.46/809.50 = 231.30/x
  3. Step 3: Cross multiply
    539.46x = 809.50 × 231.30
  4. Step 4: Simplify right side
    539.46x = 187,237.35
  5. Step 5: Solve for x
    x = 187,237.35/539.46
  6. Step 6: Final answer
    x = 347.08

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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.