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Finding the Fourth Proportional to 992.39, 1,367.93 and 660.24

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Solution

The fourth proportional to 992.39, 1,367.93 and 660.24 is: 910.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.39 : 1,367.93 = 660.24 : x
  2. Step 2: Convert to fraction form
    992.39/1,367.93 = 660.24/x
  3. Step 3: Cross multiply
    992.39x = 1,367.93 × 660.24
  4. Step 4: Simplify right side
    992.39x = 903,163.75
  5. Step 5: Solve for x
    x = 903,163.75/992.39
  6. Step 6: Final answer
    x = 910.09

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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.