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Finding the Fourth Proportional to 49.10, 73.70 and 36.40

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Solution

The fourth proportional to 49.10, 73.70 and 36.40 is: 54.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.10 : 73.70 = 36.40 : x
  2. Step 2: Convert to fraction form
    49.10/73.70 = 36.40/x
  3. Step 3: Cross multiply
    49.10x = 73.70 × 36.40
  4. Step 4: Simplify right side
    49.10x = 2,682.68
  5. Step 5: Solve for x
    x = 2,682.68/49.10
  6. Step 6: Final answer
    x = 54.64

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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.