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Finding the Fourth Proportional to 818.12, 1,224.14 and 493.71

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Solution

The fourth proportional to 818.12, 1,224.14 and 493.71 is: 738.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.12 : 1,224.14 = 493.71 : x
  2. Step 2: Convert to fraction form
    818.12/1,224.14 = 493.71/x
  3. Step 3: Cross multiply
    818.12x = 1,224.14 × 493.71
  4. Step 4: Simplify right side
    818.12x = 604,367.69
  5. Step 5: Solve for x
    x = 604,367.69/818.12
  6. Step 6: Final answer
    x = 738.73

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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.