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Finding the Fourth Proportional to 474.97, 655.53 and 396.16

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Solution

The fourth proportional to 474.97, 655.53 and 396.16 is: 546.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.97 : 655.53 = 396.16 : x
  2. Step 2: Convert to fraction form
    474.97/655.53 = 396.16/x
  3. Step 3: Cross multiply
    474.97x = 655.53 × 396.16
  4. Step 4: Simplify right side
    474.97x = 259,694.76
  5. Step 5: Solve for x
    x = 259,694.76/474.97
  6. Step 6: Final answer
    x = 546.76

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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.