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Finding the Fourth Proportional to 806.67, 1,112.27 and 748.35

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Solution

The fourth proportional to 806.67, 1,112.27 and 748.35 is: 1,031.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.67 : 1,112.27 = 748.35 : x
  2. Step 2: Convert to fraction form
    806.67/1,112.27 = 748.35/x
  3. Step 3: Cross multiply
    806.67x = 1,112.27 × 748.35
  4. Step 4: Simplify right side
    806.67x = 832,363.51
  5. Step 5: Solve for x
    x = 832,363.51/806.67
  6. Step 6: Final answer
    x = 1,031.85

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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.