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Finding the Fourth Proportional to 55.61, 83.27 and 28.51

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Solution

The fourth proportional to 55.61, 83.27 and 28.51 is: 42.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.61 : 83.27 = 28.51 : x
  2. Step 2: Convert to fraction form
    55.61/83.27 = 28.51/x
  3. Step 3: Cross multiply
    55.61x = 83.27 × 28.51
  4. Step 4: Simplify right side
    55.61x = 2,373.68
  5. Step 5: Solve for x
    x = 2,373.68/55.61
  6. Step 6: Final answer
    x = 42.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.