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Finding the Fourth Proportional to 539.85, 809.78 and 483.15

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Solution

The fourth proportional to 539.85, 809.78 and 483.15 is: 724.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.85 : 809.78 = 483.15 : x
  2. Step 2: Convert to fraction form
    539.85/809.78 = 483.15/x
  3. Step 3: Cross multiply
    539.85x = 809.78 × 483.15
  4. Step 4: Simplify right side
    539.85x = 391,242.79
  5. Step 5: Solve for x
    x = 391,242.79/539.85
  6. Step 6: Final answer
    x = 724.73

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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.