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Finding the Fourth Proportional to 376.68, 519.66 and 221.16

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Solution

The fourth proportional to 376.68, 519.66 and 221.16 is: 305.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.68 : 519.66 = 221.16 : x
  2. Step 2: Convert to fraction form
    376.68/519.66 = 221.16/x
  3. Step 3: Cross multiply
    376.68x = 519.66 × 221.16
  4. Step 4: Simplify right side
    376.68x = 114,928.01
  5. Step 5: Solve for x
    x = 114,928.01/376.68
  6. Step 6: Final answer
    x = 305.11

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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.