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Finding the Fourth Proportional to 55.40, 76.44 and 46.69

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Solution

The fourth proportional to 55.40, 76.44 and 46.69 is: 64.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.40 : 76.44 = 46.69 : x
  2. Step 2: Convert to fraction form
    55.40/76.44 = 46.69/x
  3. Step 3: Cross multiply
    55.40x = 76.44 × 46.69
  4. Step 4: Simplify right side
    55.40x = 3,568.98
  5. Step 5: Solve for x
    x = 3,568.98/55.40
  6. Step 6: Final answer
    x = 64.42

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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.