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Finding the Fourth Proportional to 586.35, 879.63 and 381.15

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Solution

The fourth proportional to 586.35, 879.63 and 381.15 is: 571.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.35 : 879.63 = 381.15 : x
  2. Step 2: Convert to fraction form
    586.35/879.63 = 381.15/x
  3. Step 3: Cross multiply
    586.35x = 879.63 × 381.15
  4. Step 4: Simplify right side
    586.35x = 335,270.97
  5. Step 5: Solve for x
    x = 335,270.97/586.35
  6. Step 6: Final answer
    x = 571.79

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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.