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Finding the Fourth Proportional to 1,174.29, 1,620.81 and 696.15

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Solution

The fourth proportional to 1,174.29, 1,620.81 and 696.15 is: 960.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.29 : 1,620.81 = 696.15 : x
  2. Step 2: Convert to fraction form
    1,174.29/1,620.81 = 696.15/x
  3. Step 3: Cross multiply
    1,174.29x = 1,620.81 × 696.15
  4. Step 4: Simplify right side
    1,174.29x = 1,128,326.88
  5. Step 5: Solve for x
    x = 1,128,326.88/1,174.29
  6. Step 6: Final answer
    x = 960.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.