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Finding the Fourth Proportional to 53.14, 79.60 and 40.22

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Solution

The fourth proportional to 53.14, 79.60 and 40.22 is: 60.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.14 : 79.60 = 40.22 : x
  2. Step 2: Convert to fraction form
    53.14/79.60 = 40.22/x
  3. Step 3: Cross multiply
    53.14x = 79.60 × 40.22
  4. Step 4: Simplify right side
    53.14x = 3,201.51
  5. Step 5: Solve for x
    x = 3,201.51/53.14
  6. Step 6: Final answer
    x = 60.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.