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Finding the Fourth Proportional to 381.79, 526.87 and 207.13

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Solution

The fourth proportional to 381.79, 526.87 and 207.13 is: 285.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.79 : 526.87 = 207.13 : x
  2. Step 2: Convert to fraction form
    381.79/526.87 = 207.13/x
  3. Step 3: Cross multiply
    381.79x = 526.87 × 207.13
  4. Step 4: Simplify right side
    381.79x = 109,130.58
  5. Step 5: Solve for x
    x = 109,130.58/381.79
  6. Step 6: Final answer
    x = 285.84

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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.