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Finding the Fourth Proportional to 540.46, 810.96 and 215.79

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Solution

The fourth proportional to 540.46, 810.96 and 215.79 is: 323.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.46 : 810.96 = 215.79 : x
  2. Step 2: Convert to fraction form
    540.46/810.96 = 215.79/x
  3. Step 3: Cross multiply
    540.46x = 810.96 × 215.79
  4. Step 4: Simplify right side
    540.46x = 174,997.06
  5. Step 5: Solve for x
    x = 174,997.06/540.46
  6. Step 6: Final answer
    x = 323.79

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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.