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Finding the Fourth Proportional to 540.68, 811.10 and 284.20

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Solution

The fourth proportional to 540.68, 811.10 and 284.20 is: 426.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.68 : 811.10 = 284.20 : x
  2. Step 2: Convert to fraction form
    540.68/811.10 = 284.20/x
  3. Step 3: Cross multiply
    540.68x = 811.10 × 284.20
  4. Step 4: Simplify right side
    540.68x = 230,514.62
  5. Step 5: Solve for x
    x = 230,514.62/540.68
  6. Step 6: Final answer
    x = 426.34

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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.