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Finding the Fourth Proportional to 3,679.40, 5,521.80 and 2,446.40

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Solution

The fourth proportional to 3,679.40, 5,521.80 and 2,446.40 is: 3,671.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,679.40 : 5,521.80 = 2,446.40 : x
  2. Step 2: Convert to fraction form
    3,679.40/5,521.80 = 2,446.40/x
  3. Step 3: Cross multiply
    3,679.40x = 5,521.80 × 2,446.40
  4. Step 4: Simplify right side
    3,679.40x = 13,508,531.52
  5. Step 5: Solve for x
    x = 13,508,531.52/3,679.40
  6. Step 6: Final answer
    x = 3,671.40

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1.5x scale

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.