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Finding the Fourth Proportional to 55.45, 82.60 and 50.77

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Solution

The fourth proportional to 55.45, 82.60 and 50.77 is: 75.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.45 : 82.60 = 50.77 : x
  2. Step 2: Convert to fraction form
    55.45/82.60 = 50.77/x
  3. Step 3: Cross multiply
    55.45x = 82.60 × 50.77
  4. Step 4: Simplify right side
    55.45x = 4,193.60
  5. Step 5: Solve for x
    x = 4,193.60/55.45
  6. Step 6: Final answer
    x = 75.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.