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Finding the Fourth Proportional to 1,079.89, 1,619.99 and 349.49

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Solution

The fourth proportional to 1,079.89, 1,619.99 and 349.49 is: 524.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.89 : 1,619.99 = 349.49 : x
  2. Step 2: Convert to fraction form
    1,079.89/1,619.99 = 349.49/x
  3. Step 3: Cross multiply
    1,079.89x = 1,619.99 × 349.49
  4. Step 4: Simplify right side
    1,079.89x = 566,170.31
  5. Step 5: Solve for x
    x = 566,170.31/1,079.89
  6. Step 6: Final answer
    x = 524.29

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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.