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Finding the Fourth Proportional to 1,016.38, 1,399.51 and 922.56

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Solution

The fourth proportional to 1,016.38, 1,399.51 and 922.56 is: 1,270.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,016.38 : 1,399.51 = 922.56 : x
  2. Step 2: Convert to fraction form
    1,016.38/1,399.51 = 922.56/x
  3. Step 3: Cross multiply
    1,016.38x = 1,399.51 × 922.56
  4. Step 4: Simplify right side
    1,016.38x = 1,291,127.85
  5. Step 5: Solve for x
    x = 1,291,127.85/1,016.38
  6. Step 6: Final answer
    x = 1,270.32

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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.