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Finding the Fourth Proportional to 1,079.43, 1,619.04 and 348.61

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Solution

The fourth proportional to 1,079.43, 1,619.04 and 348.61 is: 522.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.43 : 1,619.04 = 348.61 : x
  2. Step 2: Convert to fraction form
    1,079.43/1,619.04 = 348.61/x
  3. Step 3: Cross multiply
    1,079.43x = 1,619.04 × 348.61
  4. Step 4: Simplify right side
    1,079.43x = 564,405.44
  5. Step 5: Solve for x
    x = 564,405.44/1,079.43
  6. Step 6: Final answer
    x = 522.87

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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.