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Finding the Fourth Proportional to 906.56, 1,251.07 and 492.56

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Solution

The fourth proportional to 906.56, 1,251.07 and 492.56 is: 679.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.56 : 1,251.07 = 492.56 : x
  2. Step 2: Convert to fraction form
    906.56/1,251.07 = 492.56/x
  3. Step 3: Cross multiply
    906.56x = 1,251.07 × 492.56
  4. Step 4: Simplify right side
    906.56x = 616,231.40
  5. Step 5: Solve for x
    x = 616,231.40/906.56
  6. Step 6: Final answer
    x = 679.75

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1.5x scale

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.