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Finding the Fourth Proportional to 469.22, 647.26 and 329.55

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Solution

The fourth proportional to 469.22, 647.26 and 329.55 is: 454.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.22 : 647.26 = 329.55 : x
  2. Step 2: Convert to fraction form
    469.22/647.26 = 329.55/x
  3. Step 3: Cross multiply
    469.22x = 647.26 × 329.55
  4. Step 4: Simplify right side
    469.22x = 213,301.28
  5. Step 5: Solve for x
    x = 213,301.28/469.22
  6. Step 6: Final answer
    x = 454.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.