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Finding the Fourth Proportional to 749.29, 1,122.75 and 517.39

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Solution

The fourth proportional to 749.29, 1,122.75 and 517.39 is: 775.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.29 : 1,122.75 = 517.39 : x
  2. Step 2: Convert to fraction form
    749.29/1,122.75 = 517.39/x
  3. Step 3: Cross multiply
    749.29x = 1,122.75 × 517.39
  4. Step 4: Simplify right side
    749.29x = 580,899.62
  5. Step 5: Solve for x
    x = 580,899.62/749.29
  6. Step 6: Final answer
    x = 775.27

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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.