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Finding the Fourth Proportional to 579.81, 867.66 and 425.37

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Solution

The fourth proportional to 579.81, 867.66 and 425.37 is: 636.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.81 : 867.66 = 425.37 : x
  2. Step 2: Convert to fraction form
    579.81/867.66 = 425.37/x
  3. Step 3: Cross multiply
    579.81x = 867.66 × 425.37
  4. Step 4: Simplify right side
    579.81x = 369,076.53
  5. Step 5: Solve for x
    x = 369,076.53/579.81
  6. Step 6: Final answer
    x = 636.55

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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.