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Finding the Fourth Proportional to 1,349.26, 1,861.89 and 759.78

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Solution

The fourth proportional to 1,349.26, 1,861.89 and 759.78 is: 1,048.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,349.26 : 1,861.89 = 759.78 : x
  2. Step 2: Convert to fraction form
    1,349.26/1,861.89 = 759.78/x
  3. Step 3: Cross multiply
    1,349.26x = 1,861.89 × 759.78
  4. Step 4: Simplify right side
    1,349.26x = 1,414,623.94
  5. Step 5: Solve for x
    x = 1,414,623.94/1,349.26
  6. Step 6: Final answer
    x = 1,048.45

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1.5x scale

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.