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Finding the Fourth Proportional to 454.76, 627.42 and 396.44

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Solution

The fourth proportional to 454.76, 627.42 and 396.44 is: 546.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.76 : 627.42 = 396.44 : x
  2. Step 2: Convert to fraction form
    454.76/627.42 = 396.44/x
  3. Step 3: Cross multiply
    454.76x = 627.42 × 396.44
  4. Step 4: Simplify right side
    454.76x = 248,734.38
  5. Step 5: Solve for x
    x = 248,734.38/454.76
  6. Step 6: Final answer
    x = 546.96

Related Problems

Find fourth proportional to 227.38, 313.71 and 198.22
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Double scale
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Similar ratio
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1.5x scale

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.