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Finding the Fourth Proportional to 1,107.09, 1,673.16 and 1,087.95

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Solution

The fourth proportional to 1,107.09, 1,673.16 and 1,087.95 is: 1,644.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.09 : 1,673.16 = 1,087.95 : x
  2. Step 2: Convert to fraction form
    1,107.09/1,673.16 = 1,087.95/x
  3. Step 3: Cross multiply
    1,107.09x = 1,673.16 × 1,087.95
  4. Step 4: Simplify right side
    1,107.09x = 1,820,314.42
  5. Step 5: Solve for x
    x = 1,820,314.42/1,107.09
  6. Step 6: Final answer
    x = 1,644.23

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.