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Finding the Fourth Proportional to 53.73, 74.67 and 53.18

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Solution

The fourth proportional to 53.73, 74.67 and 53.18 is: 73.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.73 : 74.67 = 53.18 : x
  2. Step 2: Convert to fraction form
    53.73/74.67 = 53.18/x
  3. Step 3: Cross multiply
    53.73x = 74.67 × 53.18
  4. Step 4: Simplify right side
    53.73x = 3,970.58
  5. Step 5: Solve for x
    x = 3,970.58/53.73
  6. Step 6: Final answer
    x = 73.90

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.