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Finding the Fourth Proportional to 540.89, 811.54 and 216.28

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Solution

The fourth proportional to 540.89, 811.54 and 216.28 is: 324.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.89 : 811.54 = 216.28 : x
  2. Step 2: Convert to fraction form
    540.89/811.54 = 216.28/x
  3. Step 3: Cross multiply
    540.89x = 811.54 × 216.28
  4. Step 4: Simplify right side
    540.89x = 175,521.16
  5. Step 5: Solve for x
    x = 175,521.16/540.89
  6. Step 6: Final answer
    x = 324.51

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Double scale
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Similar ratio
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1.5x scale

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.