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Finding the Fourth Proportional to 52.49, 78.59 and 36.20

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Solution

The fourth proportional to 52.49, 78.59 and 36.20 is: 54.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.49 : 78.59 = 36.20 : x
  2. Step 2: Convert to fraction form
    52.49/78.59 = 36.20/x
  3. Step 3: Cross multiply
    52.49x = 78.59 × 36.20
  4. Step 4: Simplify right side
    52.49x = 2,845.24
  5. Step 5: Solve for x
    x = 2,845.24/52.49
  6. Step 6: Final answer
    x = 54.20

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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.