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Finding the Fourth Proportional to 3,998.71, 5,998.25 and 1,225.18

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Solution

The fourth proportional to 3,998.71, 5,998.25 and 1,225.18 is: 1,837.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,998.71 : 5,998.25 = 1,225.18 : x
  2. Step 2: Convert to fraction form
    3,998.71/5,998.25 = 1,225.18/x
  3. Step 3: Cross multiply
    3,998.71x = 5,998.25 × 1,225.18
  4. Step 4: Simplify right side
    3,998.71x = 7,348,929.81
  5. Step 5: Solve for x
    x = 7,348,929.81/3,998.71
  6. Step 6: Final answer
    x = 1,837.83

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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.