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Finding the Fourth Proportional to 906.36, 1,248.85 and 611.12

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Solution

The fourth proportional to 906.36, 1,248.85 and 611.12 is: 842.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.36 : 1,248.85 = 611.12 : x
  2. Step 2: Convert to fraction form
    906.36/1,248.85 = 611.12/x
  3. Step 3: Cross multiply
    906.36x = 1,248.85 × 611.12
  4. Step 4: Simplify right side
    906.36x = 763,189.44
  5. Step 5: Solve for x
    x = 763,189.44/906.36
  6. Step 6: Final answer
    x = 842.04

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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.