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Finding the Fourth Proportional to 749.00, 1,122.56 and 261.47

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Solution

The fourth proportional to 749.00, 1,122.56 and 261.47 is: 391.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.00 : 1,122.56 = 261.47 : x
  2. Step 2: Convert to fraction form
    749.00/1,122.56 = 261.47/x
  3. Step 3: Cross multiply
    749.00x = 1,122.56 × 261.47
  4. Step 4: Simplify right side
    749.00x = 293,508.84
  5. Step 5: Solve for x
    x = 293,508.84/749.00
  6. Step 6: Final answer
    x = 391.87

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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.