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Finding the Fourth Proportional to 563.72, 845.78 and 255.71

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Solution

The fourth proportional to 563.72, 845.78 and 255.71 is: 383.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.72 : 845.78 = 255.71 : x
  2. Step 2: Convert to fraction form
    563.72/845.78 = 255.71/x
  3. Step 3: Cross multiply
    563.72x = 845.78 × 255.71
  4. Step 4: Simplify right side
    563.72x = 216,273.13
  5. Step 5: Solve for x
    x = 216,273.13/563.72
  6. Step 6: Final answer
    x = 383.65

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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.