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Finding the Fourth Proportional to 1,474.41, 2,035.73 and 978.09

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Solution

The fourth proportional to 1,474.41, 2,035.73 and 978.09 is: 1,350.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,474.41 : 2,035.73 = 978.09 : x
  2. Step 2: Convert to fraction form
    1,474.41/2,035.73 = 978.09/x
  3. Step 3: Cross multiply
    1,474.41x = 2,035.73 × 978.09
  4. Step 4: Simplify right side
    1,474.41x = 1,991,121.97
  5. Step 5: Solve for x
    x = 1,991,121.97/1,474.41
  6. Step 6: Final answer
    x = 1,350.45

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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.