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Finding the Fourth Proportional to 906.92, 1,251.52 and 492.92

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Solution

The fourth proportional to 906.92, 1,251.52 and 492.92 is: 680.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.92 : 1,251.52 = 492.92 : x
  2. Step 2: Convert to fraction form
    906.92/1,251.52 = 492.92/x
  3. Step 3: Cross multiply
    906.92x = 1,251.52 × 492.92
  4. Step 4: Simplify right side
    906.92x = 616,899.24
  5. Step 5: Solve for x
    x = 616,899.24/906.92
  6. Step 6: Final answer
    x = 680.21

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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.