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Finding the Fourth Proportional to 49.86, 74.40 and 44.10

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Solution

The fourth proportional to 49.86, 74.40 and 44.10 is: 65.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.86 : 74.40 = 44.10 : x
  2. Step 2: Convert to fraction form
    49.86/74.40 = 44.10/x
  3. Step 3: Cross multiply
    49.86x = 74.40 × 44.10
  4. Step 4: Simplify right side
    49.86x = 3,281.04
  5. Step 5: Solve for x
    x = 3,281.04/49.86
  6. Step 6: Final answer
    x = 65.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.