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Finding the Fourth Proportional to 586.78, 879.49 and 326.72

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Solution

The fourth proportional to 586.78, 879.49 and 326.72 is: 489.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.78 : 879.49 = 326.72 : x
  2. Step 2: Convert to fraction form
    586.78/879.49 = 326.72/x
  3. Step 3: Cross multiply
    586.78x = 879.49 × 326.72
  4. Step 4: Simplify right side
    586.78x = 287,346.97
  5. Step 5: Solve for x
    x = 287,346.97/586.78
  6. Step 6: Final answer
    x = 489.70

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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.