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Finding the Fourth Proportional to 1,098.07, 1,648.24 and 636.75

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Solution

The fourth proportional to 1,098.07, 1,648.24 and 636.75 is: 955.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.07 : 1,648.24 = 636.75 : x
  2. Step 2: Convert to fraction form
    1,098.07/1,648.24 = 636.75/x
  3. Step 3: Cross multiply
    1,098.07x = 1,648.24 × 636.75
  4. Step 4: Simplify right side
    1,098.07x = 1,049,505.40
  5. Step 5: Solve for x
    x = 1,049,505.40/1,098.07
  6. Step 6: Final answer
    x = 955.78

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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.