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Finding the Fourth Proportional to 818.49, 1,227.74 and 722.81

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Solution

The fourth proportional to 818.49, 1,227.74 and 722.81 is: 1,084.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.49 : 1,227.74 = 722.81 : x
  2. Step 2: Convert to fraction form
    818.49/1,227.74 = 722.81/x
  3. Step 3: Cross multiply
    818.49x = 1,227.74 × 722.81
  4. Step 4: Simplify right side
    818.49x = 887,422.75
  5. Step 5: Solve for x
    x = 887,422.75/818.49
  6. Step 6: Final answer
    x = 1,084.22

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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.