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Finding the Fourth Proportional to 997.35, 1,376.65 and 682.49

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Solution

The fourth proportional to 997.35, 1,376.65 and 682.49 is: 942.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.35 : 1,376.65 = 682.49 : x
  2. Step 2: Convert to fraction form
    997.35/1,376.65 = 682.49/x
  3. Step 3: Cross multiply
    997.35x = 1,376.65 × 682.49
  4. Step 4: Simplify right side
    997.35x = 939,549.86
  5. Step 5: Solve for x
    x = 939,549.86/997.35
  6. Step 6: Final answer
    x = 942.05

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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.