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Finding the Fourth Proportional to 56.35, 84.39 and 53.38

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Solution

The fourth proportional to 56.35, 84.39 and 53.38 is: 79.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.35 : 84.39 = 53.38 : x
  2. Step 2: Convert to fraction form
    56.35/84.39 = 53.38/x
  3. Step 3: Cross multiply
    56.35x = 84.39 × 53.38
  4. Step 4: Simplify right side
    56.35x = 4,504.74
  5. Step 5: Solve for x
    x = 4,504.74/56.35
  6. Step 6: Final answer
    x = 79.94

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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.