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Finding the Fourth Proportional to 432.17, 647.44 and 226.43

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Solution

The fourth proportional to 432.17, 647.44 and 226.43 is: 339.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.17 : 647.44 = 226.43 : x
  2. Step 2: Convert to fraction form
    432.17/647.44 = 226.43/x
  3. Step 3: Cross multiply
    432.17x = 647.44 × 226.43
  4. Step 4: Simplify right side
    432.17x = 146,599.84
  5. Step 5: Solve for x
    x = 146,599.84/432.17
  6. Step 6: Final answer
    x = 339.22

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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.