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Finding the Fourth Proportional to 517.40, 775.52 and 396.16

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Solution

The fourth proportional to 517.40, 775.52 and 396.16 is: 593.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.40 : 775.52 = 396.16 : x
  2. Step 2: Convert to fraction form
    517.40/775.52 = 396.16/x
  3. Step 3: Cross multiply
    517.40x = 775.52 × 396.16
  4. Step 4: Simplify right side
    517.40x = 307,230.00
  5. Step 5: Solve for x
    x = 307,230.00/517.40
  6. Step 6: Final answer
    x = 593.80

Related Problems

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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.