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Finding the Fourth Proportional to 540.58, 811.20 and 215.95

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Solution

The fourth proportional to 540.58, 811.20 and 215.95 is: 324.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.58 : 811.20 = 215.95 : x
  2. Step 2: Convert to fraction form
    540.58/811.20 = 215.95/x
  3. Step 3: Cross multiply
    540.58x = 811.20 × 215.95
  4. Step 4: Simplify right side
    540.58x = 175,178.64
  5. Step 5: Solve for x
    x = 175,178.64/540.58
  6. Step 6: Final answer
    x = 324.06

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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.