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Finding the Fourth Proportional to 381.13, 525.95 and 213.08

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Solution

The fourth proportional to 381.13, 525.95 and 213.08 is: 294.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.13 : 525.95 = 213.08 : x
  2. Step 2: Convert to fraction form
    381.13/525.95 = 213.08/x
  3. Step 3: Cross multiply
    381.13x = 525.95 × 213.08
  4. Step 4: Simplify right side
    381.13x = 112,069.43
  5. Step 5: Solve for x
    x = 112,069.43/381.13
  6. Step 6: Final answer
    x = 294.05

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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.