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Finding the Fourth Proportional to 996.45, 1,487.31 and 934.89

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Solution

The fourth proportional to 996.45, 1,487.31 and 934.89 is: 1,395.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.45 : 1,487.31 = 934.89 : x
  2. Step 2: Convert to fraction form
    996.45/1,487.31 = 934.89/x
  3. Step 3: Cross multiply
    996.45x = 1,487.31 × 934.89
  4. Step 4: Simplify right side
    996.45x = 1,390,471.25
  5. Step 5: Solve for x
    x = 1,390,471.25/996.45
  6. Step 6: Final answer
    x = 1,395.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.