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Finding the Fourth Proportional to 1,397.28, 2,096.16 and 627.36

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Solution

The fourth proportional to 1,397.28, 2,096.16 and 627.36 is: 941.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.28 : 2,096.16 = 627.36 : x
  2. Step 2: Convert to fraction form
    1,397.28/2,096.16 = 627.36/x
  3. Step 3: Cross multiply
    1,397.28x = 2,096.16 × 627.36
  4. Step 4: Simplify right side
    1,397.28x = 1,315,046.94
  5. Step 5: Solve for x
    x = 1,315,046.94/1,397.28
  6. Step 6: Final answer
    x = 941.15

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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.