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Finding the Fourth Proportional to 1,046.74, 1,576.31 and 911.41

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Solution

The fourth proportional to 1,046.74, 1,576.31 and 911.41 is: 1,372.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,046.74 : 1,576.31 = 911.41 : x
  2. Step 2: Convert to fraction form
    1,046.74/1,576.31 = 911.41/x
  3. Step 3: Cross multiply
    1,046.74x = 1,576.31 × 911.41
  4. Step 4: Simplify right side
    1,046.74x = 1,436,664.70
  5. Step 5: Solve for x
    x = 1,436,664.70/1,046.74
  6. Step 6: Final answer
    x = 1,372.51

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.