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Finding the Fourth Proportional to 586.78, 879.46 and 326.77

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Solution

The fourth proportional to 586.78, 879.46 and 326.77 is: 489.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.78 : 879.46 = 326.77 : x
  2. Step 2: Convert to fraction form
    586.78/879.46 = 326.77/x
  3. Step 3: Cross multiply
    586.78x = 879.46 × 326.77
  4. Step 4: Simplify right side
    586.78x = 287,381.14
  5. Step 5: Solve for x
    x = 287,381.14/586.78
  6. Step 6: Final answer
    x = 489.76

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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.