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Finding the Fourth Proportional to 974.21, 1,341.39 and 760.97

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Solution

The fourth proportional to 974.21, 1,341.39 and 760.97 is: 1,047.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.21 : 1,341.39 = 760.97 : x
  2. Step 2: Convert to fraction form
    974.21/1,341.39 = 760.97/x
  3. Step 3: Cross multiply
    974.21x = 1,341.39 × 760.97
  4. Step 4: Simplify right side
    974.21x = 1,020,757.55
  5. Step 5: Solve for x
    x = 1,020,757.55/974.21
  6. Step 6: Final answer
    x = 1,047.78

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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.