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Finding the Fourth Proportional to 539.61, 809.45 and 306.86

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Solution

The fourth proportional to 539.61, 809.45 and 306.86 is: 460.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.61 : 809.45 = 306.86 : x
  2. Step 2: Convert to fraction form
    539.61/809.45 = 306.86/x
  3. Step 3: Cross multiply
    539.61x = 809.45 × 306.86
  4. Step 4: Simplify right side
    539.61x = 248,382.25
  5. Step 5: Solve for x
    x = 248,382.25/539.61
  6. Step 6: Final answer
    x = 460.30

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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.