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Finding the Fourth Proportional to 547.52, 821.63 and 393.75

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Solution

The fourth proportional to 547.52, 821.63 and 393.75 is: 590.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.52 : 821.63 = 393.75 : x
  2. Step 2: Convert to fraction form
    547.52/821.63 = 393.75/x
  3. Step 3: Cross multiply
    547.52x = 821.63 × 393.75
  4. Step 4: Simplify right side
    547.52x = 323,516.81
  5. Step 5: Solve for x
    x = 323,516.81/547.52
  6. Step 6: Final answer
    x = 590.88

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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.