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Finding the Fourth Proportional to 56.84, 84.85 and 51.80

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Solution

The fourth proportional to 56.84, 84.85 and 51.80 is: 77.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.84 : 84.85 = 51.80 : x
  2. Step 2: Convert to fraction form
    56.84/84.85 = 51.80/x
  3. Step 3: Cross multiply
    56.84x = 84.85 × 51.80
  4. Step 4: Simplify right side
    56.84x = 4,395.23
  5. Step 5: Solve for x
    x = 4,395.23/56.84
  6. Step 6: Final answer
    x = 77.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.