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Finding the Fourth Proportional to 45.48, 68.05 and 35.15

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Solution

The fourth proportional to 45.48, 68.05 and 35.15 is: 52.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.48 : 68.05 = 35.15 : x
  2. Step 2: Convert to fraction form
    45.48/68.05 = 35.15/x
  3. Step 3: Cross multiply
    45.48x = 68.05 × 35.15
  4. Step 4: Simplify right side
    45.48x = 2,391.78
  5. Step 5: Solve for x
    x = 2,391.78/45.48
  6. Step 6: Final answer
    x = 52.59

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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.