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Finding the Fourth Proportional to 1,078.46, 1,609 and 974.66

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Solution

The fourth proportional to 1,078.46, 1,609 and 974.66 is: 1,454.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078.46 : 1,609 = 974.66 : x
  2. Step 2: Convert to fraction form
    1,078.46/1,609 = 974.66/x
  3. Step 3: Cross multiply
    1,078.46x = 1,609 × 974.66
  4. Step 4: Simplify right side
    1,078.46x = 1,568,227.94
  5. Step 5: Solve for x
    x = 1,568,227.94/1,078.46
  6. Step 6: Final answer
    x = 1,454.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.