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Finding the Fourth Proportional to 1,661.22, 2,492.10 and 1,479.78

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Solution

The fourth proportional to 1,661.22, 2,492.10 and 1,479.78 is: 2,219.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,661.22 : 2,492.10 = 1,479.78 : x
  2. Step 2: Convert to fraction form
    1,661.22/2,492.10 = 1,479.78/x
  3. Step 3: Cross multiply
    1,661.22x = 2,492.10 × 1,479.78
  4. Step 4: Simplify right side
    1,661.22x = 3,687,759.74
  5. Step 5: Solve for x
    x = 3,687,759.74/1,661.22
  6. Step 6: Final answer
    x = 2,219.91

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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.