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Finding the Fourth Proportional to 669.57, 1,004.04 and 361.38

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Solution

The fourth proportional to 669.57, 1,004.04 and 361.38 is: 541.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.57 : 1,004.04 = 361.38 : x
  2. Step 2: Convert to fraction form
    669.57/1,004.04 = 361.38/x
  3. Step 3: Cross multiply
    669.57x = 1,004.04 × 361.38
  4. Step 4: Simplify right side
    669.57x = 362,839.98
  5. Step 5: Solve for x
    x = 362,839.98/669.57
  6. Step 6: Final answer
    x = 541.90

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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.