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Finding the Fourth Proportional to 454.58, 627.51 and 305.43

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Solution

The fourth proportional to 454.58, 627.51 and 305.43 is: 421.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.58 : 627.51 = 305.43 : x
  2. Step 2: Convert to fraction form
    454.58/627.51 = 305.43/x
  3. Step 3: Cross multiply
    454.58x = 627.51 × 305.43
  4. Step 4: Simplify right side
    454.58x = 191,660.38
  5. Step 5: Solve for x
    x = 191,660.38/454.58
  6. Step 6: Final answer
    x = 421.62

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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.