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Finding the Fourth Proportional to 54.52, 74.74 and 53.58

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Solution

The fourth proportional to 54.52, 74.74 and 53.58 is: 73.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.52 : 74.74 = 53.58 : x
  2. Step 2: Convert to fraction form
    54.52/74.74 = 53.58/x
  3. Step 3: Cross multiply
    54.52x = 74.74 × 53.58
  4. Step 4: Simplify right side
    54.52x = 4,004.57
  5. Step 5: Solve for x
    x = 4,004.57/54.52
  6. Step 6: Final answer
    x = 73.45

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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.