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Finding the Fourth Proportional to 1,016.36, 1,401.28 and 684.56

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Solution

The fourth proportional to 1,016.36, 1,401.28 and 684.56 is: 943.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,016.36 : 1,401.28 = 684.56 : x
  2. Step 2: Convert to fraction form
    1,016.36/1,401.28 = 684.56/x
  3. Step 3: Cross multiply
    1,016.36x = 1,401.28 × 684.56
  4. Step 4: Simplify right side
    1,016.36x = 959,260.24
  5. Step 5: Solve for x
    x = 959,260.24/1,016.36
  6. Step 6: Final answer
    x = 943.82

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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.