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Finding the Fourth Proportional to 454.40, 627.29 and 305.27

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Solution

The fourth proportional to 454.40, 627.29 and 305.27 is: 421.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.40 : 627.29 = 305.27 : x
  2. Step 2: Convert to fraction form
    454.40/627.29 = 305.27/x
  3. Step 3: Cross multiply
    454.40x = 627.29 × 305.27
  4. Step 4: Simplify right side
    454.40x = 191,491.29
  5. Step 5: Solve for x
    x = 191,491.29/454.40
  6. Step 6: Final answer
    x = 421.42

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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.