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Finding the Fourth Proportional to 579.71, 868.59 and 425.69

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Solution

The fourth proportional to 579.71, 868.59 and 425.69 is: 637.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.71 : 868.59 = 425.69 : x
  2. Step 2: Convert to fraction form
    579.71/868.59 = 425.69/x
  3. Step 3: Cross multiply
    579.71x = 868.59 × 425.69
  4. Step 4: Simplify right side
    579.71x = 369,745.73
  5. Step 5: Solve for x
    x = 369,745.73/579.71
  6. Step 6: Final answer
    x = 637.82

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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.