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Finding the Fourth Proportional to 1,079.91, 1,620.12 and 349.43

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Solution

The fourth proportional to 1,079.91, 1,620.12 and 349.43 is: 524.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.91 : 1,620.12 = 349.43 : x
  2. Step 2: Convert to fraction form
    1,079.91/1,620.12 = 349.43/x
  3. Step 3: Cross multiply
    1,079.91x = 1,620.12 × 349.43
  4. Step 4: Simplify right side
    1,079.91x = 566,110.43
  5. Step 5: Solve for x
    x = 566,110.43/1,079.91
  6. Step 6: Final answer
    x = 524.22

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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.