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Finding the Fourth Proportional to 56.77, 77.95 and 49.84

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Solution

The fourth proportional to 56.77, 77.95 and 49.84 is: 68.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.77 : 77.95 = 49.84 : x
  2. Step 2: Convert to fraction form
    56.77/77.95 = 49.84/x
  3. Step 3: Cross multiply
    56.77x = 77.95 × 49.84
  4. Step 4: Simplify right side
    56.77x = 3,885.03
  5. Step 5: Solve for x
    x = 3,885.03/56.77
  6. Step 6: Final answer
    x = 68.43

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.