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Finding the Fourth Proportional to 56.23, 84.19 and 47.49

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Solution

The fourth proportional to 56.23, 84.19 and 47.49 is: 71.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.23 : 84.19 = 47.49 : x
  2. Step 2: Convert to fraction form
    56.23/84.19 = 47.49/x
  3. Step 3: Cross multiply
    56.23x = 84.19 × 47.49
  4. Step 4: Simplify right side
    56.23x = 3,997.84
  5. Step 5: Solve for x
    x = 3,997.84/56.23
  6. Step 6: Final answer
    x = 71.10

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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.