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Finding the Fourth Proportional to 540.92, 811.14 and 378.68

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Solution

The fourth proportional to 540.92, 811.14 and 378.68 is: 567.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.92 : 811.14 = 378.68 : x
  2. Step 2: Convert to fraction form
    540.92/811.14 = 378.68/x
  3. Step 3: Cross multiply
    540.92x = 811.14 × 378.68
  4. Step 4: Simplify right side
    540.92x = 307,162.50
  5. Step 5: Solve for x
    x = 307,162.50/540.92
  6. Step 6: Final answer
    x = 567.85

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Double scale
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Similar ratio
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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.