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Finding the Fourth Proportional to 749.41, 1,121.71 and 401.87

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Solution

The fourth proportional to 749.41, 1,121.71 and 401.87 is: 601.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.41 : 1,121.71 = 401.87 : x
  2. Step 2: Convert to fraction form
    749.41/1,121.71 = 401.87/x
  3. Step 3: Cross multiply
    749.41x = 1,121.71 × 401.87
  4. Step 4: Simplify right side
    749.41x = 450,781.60
  5. Step 5: Solve for x
    x = 450,781.60/749.41
  6. Step 6: Final answer
    x = 601.52

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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.