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Finding the Fourth Proportional to 818.11, 1,227.75 and 453.19

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Solution

The fourth proportional to 818.11, 1,227.75 and 453.19 is: 680.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.11 : 1,227.75 = 453.19 : x
  2. Step 2: Convert to fraction form
    818.11/1,227.75 = 453.19/x
  3. Step 3: Cross multiply
    818.11x = 1,227.75 × 453.19
  4. Step 4: Simplify right side
    818.11x = 556,404.02
  5. Step 5: Solve for x
    x = 556,404.02/818.11
  6. Step 6: Final answer
    x = 680.11

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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.