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Finding the Fourth Proportional to 376.31, 563.93 and 213.65

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Solution

The fourth proportional to 376.31, 563.93 and 213.65 is: 320.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.31 : 563.93 = 213.65 : x
  2. Step 2: Convert to fraction form
    376.31/563.93 = 213.65/x
  3. Step 3: Cross multiply
    376.31x = 563.93 × 213.65
  4. Step 4: Simplify right side
    376.31x = 120,482.58
  5. Step 5: Solve for x
    x = 120,482.58/376.31
  6. Step 6: Final answer
    x = 320.17

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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.