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Finding the Fourth Proportional to 579.68, 868.78 and 425.56

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Solution

The fourth proportional to 579.68, 868.78 and 425.56 is: 637.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.68 : 868.78 = 425.56 : x
  2. Step 2: Convert to fraction form
    579.68/868.78 = 425.56/x
  3. Step 3: Cross multiply
    579.68x = 868.78 × 425.56
  4. Step 4: Simplify right side
    579.68x = 369,718.02
  5. Step 5: Solve for x
    x = 369,718.02/579.68
  6. Step 6: Final answer
    x = 637.80

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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.