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Finding the Fourth Proportional to 433.28, 649.75 and 155.56

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Solution

The fourth proportional to 433.28, 649.75 and 155.56 is: 233.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.28 : 649.75 = 155.56 : x
  2. Step 2: Convert to fraction form
    433.28/649.75 = 155.56/x
  3. Step 3: Cross multiply
    433.28x = 649.75 × 155.56
  4. Step 4: Simplify right side
    433.28x = 101,071.86
  5. Step 5: Solve for x
    x = 101,071.86/433.28
  6. Step 6: Final answer
    x = 233.27

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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.