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Finding the Fourth Proportional to 540.56, 811.18 and 215.91

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Solution

The fourth proportional to 540.56, 811.18 and 215.91 is: 324.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.56 : 811.18 = 215.91 : x
  2. Step 2: Convert to fraction form
    540.56/811.18 = 215.91/x
  3. Step 3: Cross multiply
    540.56x = 811.18 × 215.91
  4. Step 4: Simplify right side
    540.56x = 175,141.33
  5. Step 5: Solve for x
    x = 175,141.33/540.56
  6. Step 6: Final answer
    x = 324.00

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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.