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Finding the Fourth Proportional to 381.95, 527.22 and 242.15

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Solution

The fourth proportional to 381.95, 527.22 and 242.15 is: 334.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.95 : 527.22 = 242.15 : x
  2. Step 2: Convert to fraction form
    381.95/527.22 = 242.15/x
  3. Step 3: Cross multiply
    381.95x = 527.22 × 242.15
  4. Step 4: Simplify right side
    381.95x = 127,666.32
  5. Step 5: Solve for x
    x = 127,666.32/381.95
  6. Step 6: Final answer
    x = 334.25

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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.