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Finding the Fourth Proportional to 1,397.78, 2,096.97 and 423.96

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Solution

The fourth proportional to 1,397.78, 2,096.97 and 423.96 is: 636.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.78 : 2,096.97 = 423.96 : x
  2. Step 2: Convert to fraction form
    1,397.78/2,096.97 = 423.96/x
  3. Step 3: Cross multiply
    1,397.78x = 2,096.97 × 423.96
  4. Step 4: Simplify right side
    1,397.78x = 889,021.98
  5. Step 5: Solve for x
    x = 889,021.98/1,397.78
  6. Step 6: Final answer
    x = 636.02

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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.