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Finding the Fourth Proportional to 822.16, 1,134.28 and 538.12

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Solution

The fourth proportional to 822.16, 1,134.28 and 538.12 is: 742.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.16 : 1,134.28 = 538.12 : x
  2. Step 2: Convert to fraction form
    822.16/1,134.28 = 538.12/x
  3. Step 3: Cross multiply
    822.16x = 1,134.28 × 538.12
  4. Step 4: Simplify right side
    822.16x = 610,378.75
  5. Step 5: Solve for x
    x = 610,378.75/822.16
  6. Step 6: Final answer
    x = 742.41

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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.