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Finding the Fourth Proportional to 828.14, 1,142.79 and 566.22

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Solution

The fourth proportional to 828.14, 1,142.79 and 566.22 is: 781.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    828.14 : 1,142.79 = 566.22 : x
  2. Step 2: Convert to fraction form
    828.14/1,142.79 = 566.22/x
  3. Step 3: Cross multiply
    828.14x = 1,142.79 × 566.22
  4. Step 4: Simplify right side
    828.14x = 647,070.55
  5. Step 5: Solve for x
    x = 647,070.55/828.14
  6. Step 6: Final answer
    x = 781.35

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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.