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Finding the Fourth Proportional to 433.34, 649.42 and 405.66

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Solution

The fourth proportional to 433.34, 649.42 and 405.66 is: 607.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.34 : 649.42 = 405.66 : x
  2. Step 2: Convert to fraction form
    433.34/649.42 = 405.66/x
  3. Step 3: Cross multiply
    433.34x = 649.42 × 405.66
  4. Step 4: Simplify right side
    433.34x = 263,443.72
  5. Step 5: Solve for x
    x = 263,443.72/433.34
  6. Step 6: Final answer
    x = 607.94

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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.