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Finding the Fourth Proportional to 1,097.92, 1,639.36 and 935.52

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Solution

The fourth proportional to 1,097.92, 1,639.36 and 935.52 is: 1,396.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.92 : 1,639.36 = 935.52 : x
  2. Step 2: Convert to fraction form
    1,097.92/1,639.36 = 935.52/x
  3. Step 3: Cross multiply
    1,097.92x = 1,639.36 × 935.52
  4. Step 4: Simplify right side
    1,097.92x = 1,533,654.07
  5. Step 5: Solve for x
    x = 1,533,654.07/1,097.92
  6. Step 6: Final answer
    x = 1,396.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.