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Finding the Fourth Proportional to 2,974.40, 4,454.40 and 2,398.40

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Solution

The fourth proportional to 2,974.40, 4,454.40 and 2,398.40 is: 3,591.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,974.40 : 4,454.40 = 2,398.40 : x
  2. Step 2: Convert to fraction form
    2,974.40/4,454.40 = 2,398.40/x
  3. Step 3: Cross multiply
    2,974.40x = 4,454.40 × 2,398.40
  4. Step 4: Simplify right side
    2,974.40x = 10,683,432.96
  5. Step 5: Solve for x
    x = 10,683,432.96/2,974.40
  6. Step 6: Final answer
    x = 3,591.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.