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Finding the Fourth Proportional to 717.96, 1,077.26 and 557.04

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Solution

The fourth proportional to 717.96, 1,077.26 and 557.04 is: 835.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.96 : 1,077.26 = 557.04 : x
  2. Step 2: Convert to fraction form
    717.96/1,077.26 = 557.04/x
  3. Step 3: Cross multiply
    717.96x = 1,077.26 × 557.04
  4. Step 4: Simplify right side
    717.96x = 600,074.13
  5. Step 5: Solve for x
    x = 600,074.13/717.96
  6. Step 6: Final answer
    x = 835.80

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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.