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Finding the Fourth Proportional to 974.05, 1,344.71 and 660.98

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Solution

The fourth proportional to 974.05, 1,344.71 and 660.98 is: 912.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.05 : 1,344.71 = 660.98 : x
  2. Step 2: Convert to fraction form
    974.05/1,344.71 = 660.98/x
  3. Step 3: Cross multiply
    974.05x = 1,344.71 × 660.98
  4. Step 4: Simplify right side
    974.05x = 888,831.43
  5. Step 5: Solve for x
    x = 888,831.43/974.05
  6. Step 6: Final answer
    x = 912.51

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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.