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Finding the Fourth Proportional to 649.70, 972.08 and 361.34

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Solution

The fourth proportional to 649.70, 972.08 and 361.34 is: 540.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.70 : 972.08 = 361.34 : x
  2. Step 2: Convert to fraction form
    649.70/972.08 = 361.34/x
  3. Step 3: Cross multiply
    649.70x = 972.08 × 361.34
  4. Step 4: Simplify right side
    649.70x = 351,251.39
  5. Step 5: Solve for x
    x = 351,251.39/649.70
  6. Step 6: Final answer
    x = 540.64

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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.