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Finding the Fourth Proportional to 40.78, 56.33 and 26.25

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Solution

The fourth proportional to 40.78, 56.33 and 26.25 is: 36.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.78 : 56.33 = 26.25 : x
  2. Step 2: Convert to fraction form
    40.78/56.33 = 26.25/x
  3. Step 3: Cross multiply
    40.78x = 56.33 × 26.25
  4. Step 4: Simplify right side
    40.78x = 1,478.66
  5. Step 5: Solve for x
    x = 1,478.66/40.78
  6. Step 6: Final answer
    x = 36.26

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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.