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Finding the Fourth Proportional to 1,344.78, 2,015.33 and 694.17

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Solution

The fourth proportional to 1,344.78, 2,015.33 and 694.17 is: 1,040.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,344.78 : 2,015.33 = 694.17 : x
  2. Step 2: Convert to fraction form
    1,344.78/2,015.33 = 694.17/x
  3. Step 3: Cross multiply
    1,344.78x = 2,015.33 × 694.17
  4. Step 4: Simplify right side
    1,344.78x = 1,398,978.16
  5. Step 5: Solve for x
    x = 1,398,978.16/1,344.78
  6. Step 6: Final answer
    x = 1,040.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.