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Finding the Fourth Proportional to 55.32, 76.35 and 35.66

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Solution

The fourth proportional to 55.32, 76.35 and 35.66 is: 49.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.32 : 76.35 = 35.66 : x
  2. Step 2: Convert to fraction form
    55.32/76.35 = 35.66/x
  3. Step 3: Cross multiply
    55.32x = 76.35 × 35.66
  4. Step 4: Simplify right side
    55.32x = 2,722.26
  5. Step 5: Solve for x
    x = 2,722.26/55.32
  6. Step 6: Final answer
    x = 49.21

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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.