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Finding the Fourth Proportional to 1,107.67, 1,661.88 and 696.32

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Solution

The fourth proportional to 1,107.67, 1,661.88 and 696.32 is: 1,044.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.67 : 1,661.88 = 696.32 : x
  2. Step 2: Convert to fraction form
    1,107.67/1,661.88 = 696.32/x
  3. Step 3: Cross multiply
    1,107.67x = 1,661.88 × 696.32
  4. Step 4: Simplify right side
    1,107.67x = 1,157,203.13
  5. Step 5: Solve for x
    x = 1,157,203.13/1,107.67
  6. Step 6: Final answer
    x = 1,044.72

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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.