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Finding the Fourth Proportional to 694.16, 1,040.53 and 369.55

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Solution

The fourth proportional to 694.16, 1,040.53 and 369.55 is: 553.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.16 : 1,040.53 = 369.55 : x
  2. Step 2: Convert to fraction form
    694.16/1,040.53 = 369.55/x
  3. Step 3: Cross multiply
    694.16x = 1,040.53 × 369.55
  4. Step 4: Simplify right side
    694.16x = 384,527.86
  5. Step 5: Solve for x
    x = 384,527.86/694.16
  6. Step 6: Final answer
    x = 553.95

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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.