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Finding the Fourth Proportional to 996.84, 1,485.99 and 942.12

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Solution

The fourth proportional to 996.84, 1,485.99 and 942.12 is: 1,404.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.84 : 1,485.99 = 942.12 : x
  2. Step 2: Convert to fraction form
    996.84/1,485.99 = 942.12/x
  3. Step 3: Cross multiply
    996.84x = 1,485.99 × 942.12
  4. Step 4: Simplify right side
    996.84x = 1,399,980.90
  5. Step 5: Solve for x
    x = 1,399,980.90/996.84
  6. Step 6: Final answer
    x = 1,404.42

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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.