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Finding the Fourth Proportional to 55.40, 76.36 and 44.36

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Solution

The fourth proportional to 55.40, 76.36 and 44.36 is: 61.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.40 : 76.36 = 44.36 : x
  2. Step 2: Convert to fraction form
    55.40/76.36 = 44.36/x
  3. Step 3: Cross multiply
    55.40x = 76.36 × 44.36
  4. Step 4: Simplify right side
    55.40x = 3,387.33
  5. Step 5: Solve for x
    x = 3,387.33/55.40
  6. Step 6: Final answer
    x = 61.14

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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.