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Finding the Fourth Proportional to 717.99, 1,077.38 and 279.26

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Solution

The fourth proportional to 717.99, 1,077.38 and 279.26 is: 419.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.99 : 1,077.38 = 279.26 : x
  2. Step 2: Convert to fraction form
    717.99/1,077.38 = 279.26/x
  3. Step 3: Cross multiply
    717.99x = 1,077.38 × 279.26
  4. Step 4: Simplify right side
    717.99x = 300,869.14
  5. Step 5: Solve for x
    x = 300,869.14/717.99
  6. Step 6: Final answer
    x = 419.04

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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.