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Finding the Fourth Proportional to 992.88, 1,481.40 and 888.48

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Solution

The fourth proportional to 992.88, 1,481.40 and 888.48 is: 1,325.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.88 : 1,481.40 = 888.48 : x
  2. Step 2: Convert to fraction form
    992.88/1,481.40 = 888.48/x
  3. Step 3: Cross multiply
    992.88x = 1,481.40 × 888.48
  4. Step 4: Simplify right side
    992.88x = 1,316,194.27
  5. Step 5: Solve for x
    x = 1,316,194.27/992.88
  6. Step 6: Final answer
    x = 1,325.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.