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Finding the Fourth Proportional to 57.80, 86.76 and 35

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Solution

The fourth proportional to 57.80, 86.76 and 35 is: 52.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.80 : 86.76 = 35 : x
  2. Step 2: Convert to fraction form
    57.80/86.76 = 35/x
  3. Step 3: Cross multiply
    57.80x = 86.76 × 35
  4. Step 4: Simplify right side
    57.80x = 3,036.60
  5. Step 5: Solve for x
    x = 3,036.60/57.80
  6. Step 6: Final answer
    x = 52.54

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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.