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Finding the Fourth Proportional to 656.56, 984.11 and 579.71

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Solution

The fourth proportional to 656.56, 984.11 and 579.71 is: 868.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.56 : 984.11 = 579.71 : x
  2. Step 2: Convert to fraction form
    656.56/984.11 = 579.71/x
  3. Step 3: Cross multiply
    656.56x = 984.11 × 579.71
  4. Step 4: Simplify right side
    656.56x = 570,494.94
  5. Step 5: Solve for x
    x = 570,494.94/656.56
  6. Step 6: Final answer
    x = 868.92

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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.