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Finding the Fourth Proportional to 539.68, 809.64 and 308.82

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Solution

The fourth proportional to 539.68, 809.64 and 308.82 is: 463.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.68 : 809.64 = 308.82 : x
  2. Step 2: Convert to fraction form
    539.68/809.64 = 308.82/x
  3. Step 3: Cross multiply
    539.68x = 809.64 × 308.82
  4. Step 4: Simplify right side
    539.68x = 250,033.02
  5. Step 5: Solve for x
    x = 250,033.02/539.68
  6. Step 6: Final answer
    x = 463.30

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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.