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Finding the Fourth Proportional to 912.26, 1,260.09 and 748.51

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Solution

The fourth proportional to 912.26, 1,260.09 and 748.51 is: 1,033.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.26 : 1,260.09 = 748.51 : x
  2. Step 2: Convert to fraction form
    912.26/1,260.09 = 748.51/x
  3. Step 3: Cross multiply
    912.26x = 1,260.09 × 748.51
  4. Step 4: Simplify right side
    912.26x = 943,186.82
  5. Step 5: Solve for x
    x = 943,186.82/912.26
  6. Step 6: Final answer
    x = 1,033.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.