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Finding the Fourth Proportional to 40.98, 56.57 and 27.88

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Solution

The fourth proportional to 40.98, 56.57 and 27.88 is: 38.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.98 : 56.57 = 27.88 : x
  2. Step 2: Convert to fraction form
    40.98/56.57 = 27.88/x
  3. Step 3: Cross multiply
    40.98x = 56.57 × 27.88
  4. Step 4: Simplify right side
    40.98x = 1,577.03
  5. Step 5: Solve for x
    x = 1,577.03/40.98
  6. Step 6: Final answer
    x = 38.49

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Find fourth proportional to 20.49, 28.28 and 13.94
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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.