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Finding the Fourth Proportional to 381.74, 526.74 and 215.94

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Solution

The fourth proportional to 381.74, 526.74 and 215.94 is: 297.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.74 : 526.74 = 215.94 : x
  2. Step 2: Convert to fraction form
    381.74/526.74 = 215.94/x
  3. Step 3: Cross multiply
    381.74x = 526.74 × 215.94
  4. Step 4: Simplify right side
    381.74x = 113,744.24
  5. Step 5: Solve for x
    x = 113,744.24/381.74
  6. Step 6: Final answer
    x = 297.97

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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.