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Finding the Fourth Proportional to 381.71, 526.75 and 207.05

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Solution

The fourth proportional to 381.71, 526.75 and 207.05 is: 285.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.71 : 526.75 = 207.05 : x
  2. Step 2: Convert to fraction form
    381.71/526.75 = 207.05/x
  3. Step 3: Cross multiply
    381.71x = 526.75 × 207.05
  4. Step 4: Simplify right side
    381.71x = 109,060.44
  5. Step 5: Solve for x
    x = 109,060.44/381.71
  6. Step 6: Final answer
    x = 285.72

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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.