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Finding the Fourth Proportional to 52.18, 78.25 and 35.05

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Solution

The fourth proportional to 52.18, 78.25 and 35.05 is: 52.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.18 : 78.25 = 35.05 : x
  2. Step 2: Convert to fraction form
    52.18/78.25 = 35.05/x
  3. Step 3: Cross multiply
    52.18x = 78.25 × 35.05
  4. Step 4: Simplify right side
    52.18x = 2,742.49
  5. Step 5: Solve for x
    x = 2,742.49/52.18
  6. Step 6: Final answer
    x = 52.56

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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.