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Finding the Fourth Proportional to 718.27, 1,077.75 and 499.57

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Solution

The fourth proportional to 718.27, 1,077.75 and 499.57 is: 749.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.27 : 1,077.75 = 499.57 : x
  2. Step 2: Convert to fraction form
    718.27/1,077.75 = 499.57/x
  3. Step 3: Cross multiply
    718.27x = 1,077.75 × 499.57
  4. Step 4: Simplify right side
    718.27x = 538,408.87
  5. Step 5: Solve for x
    x = 538,408.87/718.27
  6. Step 6: Final answer
    x = 749.59

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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.