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Finding the Fourth Proportional to 906.54, 1,251.06 and 492.54

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Solution

The fourth proportional to 906.54, 1,251.06 and 492.54 is: 679.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.54 : 1,251.06 = 492.54 : x
  2. Step 2: Convert to fraction form
    906.54/1,251.06 = 492.54/x
  3. Step 3: Cross multiply
    906.54x = 1,251.06 × 492.54
  4. Step 4: Simplify right side
    906.54x = 616,197.09
  5. Step 5: Solve for x
    x = 616,197.09/906.54
  6. Step 6: Final answer
    x = 679.72

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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.