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Finding the Fourth Proportional to 540.90, 811.77 and 216.48

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Solution

The fourth proportional to 540.90, 811.77 and 216.48 is: 324.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.90 : 811.77 = 216.48 : x
  2. Step 2: Convert to fraction form
    540.90/811.77 = 216.48/x
  3. Step 3: Cross multiply
    540.90x = 811.77 × 216.48
  4. Step 4: Simplify right side
    540.90x = 175,731.97
  5. Step 5: Solve for x
    x = 175,731.97/540.90
  6. Step 6: Final answer
    x = 324.89

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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.