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Finding the Fourth Proportional to 54.99, 75.44 and 54.57

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Solution

The fourth proportional to 54.99, 75.44 and 54.57 is: 74.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.99 : 75.44 = 54.57 : x
  2. Step 2: Convert to fraction form
    54.99/75.44 = 54.57/x
  3. Step 3: Cross multiply
    54.99x = 75.44 × 54.57
  4. Step 4: Simplify right side
    54.99x = 4,116.76
  5. Step 5: Solve for x
    x = 4,116.76/54.99
  6. Step 6: Final answer
    x = 74.86

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.