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Finding the Fourth Proportional to 54.40, 75.10 and 45.22

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Solution

The fourth proportional to 54.40, 75.10 and 45.22 is: 62.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.40 : 75.10 = 45.22 : x
  2. Step 2: Convert to fraction form
    54.40/75.10 = 45.22/x
  3. Step 3: Cross multiply
    54.40x = 75.10 × 45.22
  4. Step 4: Simplify right side
    54.40x = 3,396.02
  5. Step 5: Solve for x
    x = 3,396.02/54.40
  6. Step 6: Final answer
    x = 62.43

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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.