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Finding the Fourth Proportional to 1,174.19, 1,763.78 and 712.17

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Solution

The fourth proportional to 1,174.19, 1,763.78 and 712.17 is: 1,069.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.19 : 1,763.78 = 712.17 : x
  2. Step 2: Convert to fraction form
    1,174.19/1,763.78 = 712.17/x
  3. Step 3: Cross multiply
    1,174.19x = 1,763.78 × 712.17
  4. Step 4: Simplify right side
    1,174.19x = 1,256,107.64
  5. Step 5: Solve for x
    x = 1,256,107.64/1,174.19
  6. Step 6: Final answer
    x = 1,069.77

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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.