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Finding the Fourth Proportional to 2,275.80, 3,408.84 and 1,407.48

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Solution

The fourth proportional to 2,275.80, 3,408.84 and 1,407.48 is: 2,108.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.80 : 3,408.84 = 1,407.48 : x
  2. Step 2: Convert to fraction form
    2,275.80/3,408.84 = 1,407.48/x
  3. Step 3: Cross multiply
    2,275.80x = 3,408.84 × 1,407.48
  4. Step 4: Simplify right side
    2,275.80x = 4,797,874.12
  5. Step 5: Solve for x
    x = 4,797,874.12/2,275.80
  6. Step 6: Final answer
    x = 2,108.21

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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.