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Finding the Fourth Proportional to 474.20, 653.72 and 326.60

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Solution

The fourth proportional to 474.20, 653.72 and 326.60 is: 450.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.20 : 653.72 = 326.60 : x
  2. Step 2: Convert to fraction form
    474.20/653.72 = 326.60/x
  3. Step 3: Cross multiply
    474.20x = 653.72 × 326.60
  4. Step 4: Simplify right side
    474.20x = 213,504.95
  5. Step 5: Solve for x
    x = 213,504.95/474.20
  6. Step 6: Final answer
    x = 450.24

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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.