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Finding the Fourth Proportional to 56.05, 77.40 and 37.69

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Solution

The fourth proportional to 56.05, 77.40 and 37.69 is: 52.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.05 : 77.40 = 37.69 : x
  2. Step 2: Convert to fraction form
    56.05/77.40 = 37.69/x
  3. Step 3: Cross multiply
    56.05x = 77.40 × 37.69
  4. Step 4: Simplify right side
    56.05x = 2,917.21
  5. Step 5: Solve for x
    x = 2,917.21/56.05
  6. Step 6: Final answer
    x = 52.05

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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.