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Finding the Fourth Proportional to 41.70, 57.50 and 28.58

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Solution

The fourth proportional to 41.70, 57.50 and 28.58 is: 39.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.70 : 57.50 = 28.58 : x
  2. Step 2: Convert to fraction form
    41.70/57.50 = 28.58/x
  3. Step 3: Cross multiply
    41.70x = 57.50 × 28.58
  4. Step 4: Simplify right side
    41.70x = 1,643.35
  5. Step 5: Solve for x
    x = 1,643.35/41.70
  6. Step 6: Final answer
    x = 39.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.