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Finding the Fourth Proportional to 670.97, 998.84 and 667.32

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Solution

The fourth proportional to 670.97, 998.84 and 667.32 is: 993.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.97 : 998.84 = 667.32 : x
  2. Step 2: Convert to fraction form
    670.97/998.84 = 667.32/x
  3. Step 3: Cross multiply
    670.97x = 998.84 × 667.32
  4. Step 4: Simplify right side
    670.97x = 666,542.57
  5. Step 5: Solve for x
    x = 666,542.57/670.97
  6. Step 6: Final answer
    x = 993.41

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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.