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Finding the Fourth Proportional to 46.15, 68.74 and 43.81

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Solution

The fourth proportional to 46.15, 68.74 and 43.81 is: 65.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.15 : 68.74 = 43.81 : x
  2. Step 2: Convert to fraction form
    46.15/68.74 = 43.81/x
  3. Step 3: Cross multiply
    46.15x = 68.74 × 43.81
  4. Step 4: Simplify right side
    46.15x = 3,011.22
  5. Step 5: Solve for x
    x = 3,011.22/46.15
  6. Step 6: Final answer
    x = 65.25

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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.