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Finding the Fourth Proportional to 996.90, 1,376.46 and 604.45

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Solution

The fourth proportional to 996.90, 1,376.46 and 604.45 is: 834.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.90 : 1,376.46 = 604.45 : x
  2. Step 2: Convert to fraction form
    996.90/1,376.46 = 604.45/x
  3. Step 3: Cross multiply
    996.90x = 1,376.46 × 604.45
  4. Step 4: Simplify right side
    996.90x = 832,001.25
  5. Step 5: Solve for x
    x = 832,001.25/996.90
  6. Step 6: Final answer
    x = 834.59

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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.