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Finding the Fourth Proportional to 454.41, 627.85 and 438.01

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Solution

The fourth proportional to 454.41, 627.85 and 438.01 is: 605.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.41 : 627.85 = 438.01 : x
  2. Step 2: Convert to fraction form
    454.41/627.85 = 438.01/x
  3. Step 3: Cross multiply
    454.41x = 627.85 × 438.01
  4. Step 4: Simplify right side
    454.41x = 275,003.56
  5. Step 5: Solve for x
    x = 275,003.56/454.41
  6. Step 6: Final answer
    x = 605.19

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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.