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Finding the Fourth Proportional to 828.84, 1,142.85 and 751.08

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Solution

The fourth proportional to 828.84, 1,142.85 and 751.08 is: 1,035.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    828.84 : 1,142.85 = 751.08 : x
  2. Step 2: Convert to fraction form
    828.84/1,142.85 = 751.08/x
  3. Step 3: Cross multiply
    828.84x = 1,142.85 × 751.08
  4. Step 4: Simplify right side
    828.84x = 858,371.78
  5. Step 5: Solve for x
    x = 858,371.78/828.84
  6. Step 6: Final answer
    x = 1,035.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.