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Finding the Fourth Proportional to 998.33, 1,375.79 and 714.02

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Solution

The fourth proportional to 998.33, 1,375.79 and 714.02 is: 983.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.33 : 1,375.79 = 714.02 : x
  2. Step 2: Convert to fraction form
    998.33/1,375.79 = 714.02/x
  3. Step 3: Cross multiply
    998.33x = 1,375.79 × 714.02
  4. Step 4: Simplify right side
    998.33x = 982,331.13
  5. Step 5: Solve for x
    x = 982,331.13/998.33
  6. Step 6: Final answer
    x = 983.98

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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.