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Finding the Fourth Proportional to 1,107.46, 1,661.05 and 695.34

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Solution

The fourth proportional to 1,107.46, 1,661.05 and 695.34 is: 1,042.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.46 : 1,661.05 = 695.34 : x
  2. Step 2: Convert to fraction form
    1,107.46/1,661.05 = 695.34/x
  3. Step 3: Cross multiply
    1,107.46x = 1,661.05 × 695.34
  4. Step 4: Simplify right side
    1,107.46x = 1,154,995.38
  5. Step 5: Solve for x
    x = 1,154,995.38/1,107.46
  6. Step 6: Final answer
    x = 1,042.92

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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.