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Finding the Fourth Proportional to 822.18, 1,135.17 and 527.82

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Solution

The fourth proportional to 822.18, 1,135.17 and 527.82 is: 728.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.18 : 1,135.17 = 527.82 : x
  2. Step 2: Convert to fraction form
    822.18/1,135.17 = 527.82/x
  3. Step 3: Cross multiply
    822.18x = 1,135.17 × 527.82
  4. Step 4: Simplify right side
    822.18x = 599,165.43
  5. Step 5: Solve for x
    x = 599,165.43/822.18
  6. Step 6: Final answer
    x = 728.75

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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.