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Finding the Fourth Proportional to 2,650.22, 3,976.04 and 918.85

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Solution

The fourth proportional to 2,650.22, 3,976.04 and 918.85 is: 1,378.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,650.22 : 3,976.04 = 918.85 : x
  2. Step 2: Convert to fraction form
    2,650.22/3,976.04 = 918.85/x
  3. Step 3: Cross multiply
    2,650.22x = 3,976.04 × 918.85
  4. Step 4: Simplify right side
    2,650.22x = 3,653,364.47
  5. Step 5: Solve for x
    x = 3,653,364.47/2,650.22
  6. Step 6: Final answer
    x = 1,378.51

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.