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Finding the Fourth Proportional to 1,399.52, 2,097.56 and 618.68

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Solution

The fourth proportional to 1,399.52, 2,097.56 and 618.68 is: 927.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.52 : 2,097.56 = 618.68 : x
  2. Step 2: Convert to fraction form
    1,399.52/2,097.56 = 618.68/x
  3. Step 3: Cross multiply
    1,399.52x = 2,097.56 × 618.68
  4. Step 4: Simplify right side
    1,399.52x = 1,297,725.21
  5. Step 5: Solve for x
    x = 1,297,725.21/1,399.52
  6. Step 6: Final answer
    x = 927.26

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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.