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Finding the Fourth Proportional to 819.84, 1,137 and 750.65

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Solution

The fourth proportional to 819.84, 1,137 and 750.65 is: 1,041.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    819.84 : 1,137 = 750.65 : x
  2. Step 2: Convert to fraction form
    819.84/1,137 = 750.65/x
  3. Step 3: Cross multiply
    819.84x = 1,137 × 750.65
  4. Step 4: Simplify right side
    819.84x = 853,489.05
  5. Step 5: Solve for x
    x = 853,489.05/819.84
  6. Step 6: Final answer
    x = 1,041.04

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.