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Finding the Fourth Proportional to 693.98, 1,040.67 and 369.28

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Solution

The fourth proportional to 693.98, 1,040.67 and 369.28 is: 553.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.98 : 1,040.67 = 369.28 : x
  2. Step 2: Convert to fraction form
    693.98/1,040.67 = 369.28/x
  3. Step 3: Cross multiply
    693.98x = 1,040.67 × 369.28
  4. Step 4: Simplify right side
    693.98x = 384,291.57
  5. Step 5: Solve for x
    x = 384,291.57/693.98
  6. Step 6: Final answer
    x = 553.75

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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.