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Finding the Fourth Proportional to 430.22, 644.90 and 244.86

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Solution

The fourth proportional to 430.22, 644.90 and 244.86 is: 367.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.22 : 644.90 = 244.86 : x
  2. Step 2: Convert to fraction form
    430.22/644.90 = 244.86/x
  3. Step 3: Cross multiply
    430.22x = 644.90 × 244.86
  4. Step 4: Simplify right side
    430.22x = 157,906.57
  5. Step 5: Solve for x
    x = 157,906.57/430.22
  6. Step 6: Final answer
    x = 367.03

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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.