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Finding the Fourth Proportional to 997.39, 1,498.38 and 628.35

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Solution

The fourth proportional to 997.39, 1,498.38 and 628.35 is: 943.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.39 : 1,498.38 = 628.35 : x
  2. Step 2: Convert to fraction form
    997.39/1,498.38 = 628.35/x
  3. Step 3: Cross multiply
    997.39x = 1,498.38 × 628.35
  4. Step 4: Simplify right side
    997.39x = 941,507.07
  5. Step 5: Solve for x
    x = 941,507.07/997.39
  6. Step 6: Final answer
    x = 943.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.