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Finding the Fourth Proportional to 1,755.20, 2,630.10 and 1,479.80

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Solution

The fourth proportional to 1,755.20, 2,630.10 and 1,479.80 is: 2,217.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,755.20 : 2,630.10 = 1,479.80 : x
  2. Step 2: Convert to fraction form
    1,755.20/2,630.10 = 1,479.80/x
  3. Step 3: Cross multiply
    1,755.20x = 2,630.10 × 1,479.80
  4. Step 4: Simplify right side
    1,755.20x = 3,892,021.98
  5. Step 5: Solve for x
    x = 3,892,021.98/1,755.20
  6. Step 6: Final answer
    x = 2,217.42

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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.