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Finding the Fourth Proportional to 55.94, 84.22 and 55.40

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Solution

The fourth proportional to 55.94, 84.22 and 55.40 is: 83.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.94 : 84.22 = 55.40 : x
  2. Step 2: Convert to fraction form
    55.94/84.22 = 55.40/x
  3. Step 3: Cross multiply
    55.94x = 84.22 × 55.40
  4. Step 4: Simplify right side
    55.94x = 4,665.79
  5. Step 5: Solve for x
    x = 4,665.79/55.94
  6. Step 6: Final answer
    x = 83.41

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.