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Finding the Fourth Proportional to 517.56, 775.74 and 225.30

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Solution

The fourth proportional to 517.56, 775.74 and 225.30 is: 337.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.56 : 775.74 = 225.30 : x
  2. Step 2: Convert to fraction form
    517.56/775.74 = 225.30/x
  3. Step 3: Cross multiply
    517.56x = 775.74 × 225.30
  4. Step 4: Simplify right side
    517.56x = 174,774.22
  5. Step 5: Solve for x
    x = 174,774.22/517.56
  6. Step 6: Final answer
    x = 337.69

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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.