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Finding the Fourth Proportional to 818.68, 1,226.58 and 769.96

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Solution

The fourth proportional to 818.68, 1,226.58 and 769.96 is: 1,153.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.68 : 1,226.58 = 769.96 : x
  2. Step 2: Convert to fraction form
    818.68/1,226.58 = 769.96/x
  3. Step 3: Cross multiply
    818.68x = 1,226.58 × 769.96
  4. Step 4: Simplify right side
    818.68x = 944,417.54
  5. Step 5: Solve for x
    x = 944,417.54/818.68
  6. Step 6: Final answer
    x = 1,153.59

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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.