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Finding the Fourth Proportional to 1,397.68, 2,096.79 and 531.92

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Solution

The fourth proportional to 1,397.68, 2,096.79 and 531.92 is: 797.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.68 : 2,096.79 = 531.92 : x
  2. Step 2: Convert to fraction form
    1,397.68/2,096.79 = 531.92/x
  3. Step 3: Cross multiply
    1,397.68x = 2,096.79 × 531.92
  4. Step 4: Simplify right side
    1,397.68x = 1,115,324.54
  5. Step 5: Solve for x
    x = 1,115,324.54/1,397.68
  6. Step 6: Final answer
    x = 797.98

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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.