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Finding the Fourth Proportional to 56.22, 77.60 and 37.82

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Solution

The fourth proportional to 56.22, 77.60 and 37.82 is: 52.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.22 : 77.60 = 37.82 : x
  2. Step 2: Convert to fraction form
    56.22/77.60 = 37.82/x
  3. Step 3: Cross multiply
    56.22x = 77.60 × 37.82
  4. Step 4: Simplify right side
    56.22x = 2,935.12
  5. Step 5: Solve for x
    x = 2,935.12/56.22
  6. Step 6: Final answer
    x = 52.21

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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.