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Finding the Fourth Proportional to 56.12, 84.05 and 34.47

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Solution

The fourth proportional to 56.12, 84.05 and 34.47 is: 51.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.12 : 84.05 = 34.47 : x
  2. Step 2: Convert to fraction form
    56.12/84.05 = 34.47/x
  3. Step 3: Cross multiply
    56.12x = 84.05 × 34.47
  4. Step 4: Simplify right side
    56.12x = 2,897.03
  5. Step 5: Solve for x
    x = 2,897.03/56.12
  6. Step 6: Final answer
    x = 51.62

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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.