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Finding the Fourth Proportional to 690.44, 1,034.64 and 366.03

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Solution

The fourth proportional to 690.44, 1,034.64 and 366.03 is: 548.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.44 : 1,034.64 = 366.03 : x
  2. Step 2: Convert to fraction form
    690.44/1,034.64 = 366.03/x
  3. Step 3: Cross multiply
    690.44x = 1,034.64 × 366.03
  4. Step 4: Simplify right side
    690.44x = 378,709.28
  5. Step 5: Solve for x
    x = 378,709.28/690.44
  6. Step 6: Final answer
    x = 548.51

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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.