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Finding the Fourth Proportional to 997.46, 1,375.58 and 683.18

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Solution

The fourth proportional to 997.46, 1,375.58 and 683.18 is: 942.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.46 : 1,375.58 = 683.18 : x
  2. Step 2: Convert to fraction form
    997.46/1,375.58 = 683.18/x
  3. Step 3: Cross multiply
    997.46x = 1,375.58 × 683.18
  4. Step 4: Simplify right side
    997.46x = 939,776.47
  5. Step 5: Solve for x
    x = 939,776.47/997.46
  6. Step 6: Final answer
    x = 942.17

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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.