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Finding the Fourth Proportional to 379, 523 and 213.16

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Solution

The fourth proportional to 379, 523 and 213.16 is: 294.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    379 : 523 = 213.16 : x
  2. Step 2: Convert to fraction form
    379/523 = 213.16/x
  3. Step 3: Cross multiply
    379x = 523 × 213.16
  4. Step 4: Simplify right side
    379x = 111,482.68
  5. Step 5: Solve for x
    x = 111,482.68/379
  6. Step 6: Final answer
    x = 294.15

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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.