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Finding the Fourth Proportional to 997.04, 1,376.40 and 683.96

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Solution

The fourth proportional to 997.04, 1,376.40 and 683.96 is: 944.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.04 : 1,376.40 = 683.96 : x
  2. Step 2: Convert to fraction form
    997.04/1,376.40 = 683.96/x
  3. Step 3: Cross multiply
    997.04x = 1,376.40 × 683.96
  4. Step 4: Simplify right side
    997.04x = 941,402.54
  5. Step 5: Solve for x
    x = 941,402.54/997.04
  6. Step 6: Final answer
    x = 944.20

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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.