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Finding the Fourth Proportional to 579.41, 869.11 and 146.56

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Solution

The fourth proportional to 579.41, 869.11 and 146.56 is: 219.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.41 : 869.11 = 146.56 : x
  2. Step 2: Convert to fraction form
    579.41/869.11 = 146.56/x
  3. Step 3: Cross multiply
    579.41x = 869.11 × 146.56
  4. Step 4: Simplify right side
    579.41x = 127,376.76
  5. Step 5: Solve for x
    x = 127,376.76/579.41
  6. Step 6: Final answer
    x = 219.84

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Double scale
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Similar ratio
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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.