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Finding the Fourth Proportional to 56.25, 84.29 and 36

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Solution

The fourth proportional to 56.25, 84.29 and 36 is: 53.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.25 : 84.29 = 36 : x
  2. Step 2: Convert to fraction form
    56.25/84.29 = 36/x
  3. Step 3: Cross multiply
    56.25x = 84.29 × 36
  4. Step 4: Simplify right side
    56.25x = 3,034.26
  5. Step 5: Solve for x
    x = 3,034.26/56.25
  6. Step 6: Final answer
    x = 53.94

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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.