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Finding the Fourth Proportional to 430.17, 644.43 and 224.43

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Solution

The fourth proportional to 430.17, 644.43 and 224.43 is: 336.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.17 : 644.43 = 224.43 : x
  2. Step 2: Convert to fraction form
    430.17/644.43 = 224.43/x
  3. Step 3: Cross multiply
    430.17x = 644.43 × 224.43
  4. Step 4: Simplify right side
    430.17x = 144,629.42
  5. Step 5: Solve for x
    x = 144,629.42/430.17
  6. Step 6: Final answer
    x = 336.21

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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.