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Finding the Fourth Proportional to 1,348.65, 1,861.17 and 759.18

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Solution

The fourth proportional to 1,348.65, 1,861.17 and 759.18 is: 1,047.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,348.65 : 1,861.17 = 759.18 : x
  2. Step 2: Convert to fraction form
    1,348.65/1,861.17 = 759.18/x
  3. Step 3: Cross multiply
    1,348.65x = 1,861.17 × 759.18
  4. Step 4: Simplify right side
    1,348.65x = 1,412,963.04
  5. Step 5: Solve for x
    x = 1,412,963.04/1,348.65
  6. Step 6: Final answer
    x = 1,047.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.