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Finding the Fourth Proportional to 586.96, 879.66 and 381.42

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Solution

The fourth proportional to 586.96, 879.66 and 381.42 is: 571.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.96 : 879.66 = 381.42 : x
  2. Step 2: Convert to fraction form
    586.96/879.66 = 381.42/x
  3. Step 3: Cross multiply
    586.96x = 879.66 × 381.42
  4. Step 4: Simplify right side
    586.96x = 335,519.92
  5. Step 5: Solve for x
    x = 335,519.92/586.96
  6. Step 6: Final answer
    x = 571.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.