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Finding the Fourth Proportional to 55.33, 76.29 and 40.75

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Solution

The fourth proportional to 55.33, 76.29 and 40.75 is: 56.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.33 : 76.29 = 40.75 : x
  2. Step 2: Convert to fraction form
    55.33/76.29 = 40.75/x
  3. Step 3: Cross multiply
    55.33x = 76.29 × 40.75
  4. Step 4: Simplify right side
    55.33x = 3,108.82
  5. Step 5: Solve for x
    x = 3,108.82/55.33
  6. Step 6: Final answer
    x = 56.19

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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.