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Finding the Fourth Proportional to 3,098.76, 4,274.76 and 1,919.64

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Solution

The fourth proportional to 3,098.76, 4,274.76 and 1,919.64 is: 2,648.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,098.76 : 4,274.76 = 1,919.64 : x
  2. Step 2: Convert to fraction form
    3,098.76/4,274.76 = 1,919.64/x
  3. Step 3: Cross multiply
    3,098.76x = 4,274.76 × 1,919.64
  4. Step 4: Simplify right side
    3,098.76x = 8,206,000.29
  5. Step 5: Solve for x
    x = 8,206,000.29/3,098.76
  6. Step 6: Final answer
    x = 2,648.16

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Half scale
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Double scale
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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.