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Finding the Fourth Proportional to 996.47, 1,372.32 and 974.94

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Solution

The fourth proportional to 996.47, 1,372.32 and 974.94 is: 1,342.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.47 : 1,372.32 = 974.94 : x
  2. Step 2: Convert to fraction form
    996.47/1,372.32 = 974.94/x
  3. Step 3: Cross multiply
    996.47x = 1,372.32 × 974.94
  4. Step 4: Simplify right side
    996.47x = 1,337,929.66
  5. Step 5: Solve for x
    x = 1,337,929.66/996.47
  6. Step 6: Final answer
    x = 1,342.68

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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.