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Finding the Fourth Proportional to 892.71, 1,231.88 and 538.58

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Solution

The fourth proportional to 892.71, 1,231.88 and 538.58 is: 743.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.71 : 1,231.88 = 538.58 : x
  2. Step 2: Convert to fraction form
    892.71/1,231.88 = 538.58/x
  3. Step 3: Cross multiply
    892.71x = 1,231.88 × 538.58
  4. Step 4: Simplify right side
    892.71x = 663,466.32
  5. Step 5: Solve for x
    x = 663,466.32/892.71
  6. Step 6: Final answer
    x = 743.20

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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.