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Finding the Fourth Proportional to 43.65, 60.21 and 39.51

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Solution

The fourth proportional to 43.65, 60.21 and 39.51 is: 54.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.65 : 60.21 = 39.51 : x
  2. Step 2: Convert to fraction form
    43.65/60.21 = 39.51/x
  3. Step 3: Cross multiply
    43.65x = 60.21 × 39.51
  4. Step 4: Simplify right side
    43.65x = 2,378.90
  5. Step 5: Solve for x
    x = 2,378.90/43.65
  6. Step 6: Final answer
    x = 54.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.