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Finding the Fourth Proportional to 1,396.48, 2,095.02 and 422.68

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Solution

The fourth proportional to 1,396.48, 2,095.02 and 422.68 is: 634.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.48 : 2,095.02 = 422.68 : x
  2. Step 2: Convert to fraction form
    1,396.48/2,095.02 = 422.68/x
  3. Step 3: Cross multiply
    1,396.48x = 2,095.02 × 422.68
  4. Step 4: Simplify right side
    1,396.48x = 885,523.05
  5. Step 5: Solve for x
    x = 885,523.05/1,396.48
  6. Step 6: Final answer
    x = 634.11

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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.