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Finding the Fourth Proportional to 1,174.88, 1,619.82 and 964.28

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Solution

The fourth proportional to 1,174.88, 1,619.82 and 964.28 is: 1,329.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.88 : 1,619.82 = 964.28 : x
  2. Step 2: Convert to fraction form
    1,174.88/1,619.82 = 964.28/x
  3. Step 3: Cross multiply
    1,174.88x = 1,619.82 × 964.28
  4. Step 4: Simplify right side
    1,174.88x = 1,561,960.03
  5. Step 5: Solve for x
    x = 1,561,960.03/1,174.88
  6. Step 6: Final answer
    x = 1,329.46

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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.