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Finding the Fourth Proportional to 974.46, 1,344.94 and 659.72

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Solution

The fourth proportional to 974.46, 1,344.94 and 659.72 is: 910.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.46 : 1,344.94 = 659.72 : x
  2. Step 2: Convert to fraction form
    974.46/1,344.94 = 659.72/x
  3. Step 3: Cross multiply
    974.46x = 1,344.94 × 659.72
  4. Step 4: Simplify right side
    974.46x = 887,283.82
  5. Step 5: Solve for x
    x = 887,283.82/974.46
  6. Step 6: Final answer
    x = 910.54

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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.