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Finding the Fourth Proportional to 1,397.43, 2,095.74 and 423.81

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Solution

The fourth proportional to 1,397.43, 2,095.74 and 423.81 is: 635.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.43 : 2,095.74 = 423.81 : x
  2. Step 2: Convert to fraction form
    1,397.43/2,095.74 = 423.81/x
  3. Step 3: Cross multiply
    1,397.43x = 2,095.74 × 423.81
  4. Step 4: Simplify right side
    1,397.43x = 888,195.57
  5. Step 5: Solve for x
    x = 888,195.57/1,397.43
  6. Step 6: Final answer
    x = 635.59

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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.