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Finding the Fourth Proportional to 55.27, 76.03 and 51.22

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Solution

The fourth proportional to 55.27, 76.03 and 51.22 is: 70.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.27 : 76.03 = 51.22 : x
  2. Step 2: Convert to fraction form
    55.27/76.03 = 51.22/x
  3. Step 3: Cross multiply
    55.27x = 76.03 × 51.22
  4. Step 4: Simplify right side
    55.27x = 3,894.26
  5. Step 5: Solve for x
    x = 3,894.26/55.27
  6. Step 6: Final answer
    x = 70.46

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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.