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Finding the Fourth Proportional to 579.71, 869.57 and 146.87

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Solution

The fourth proportional to 579.71, 869.57 and 146.87 is: 220.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.71 : 869.57 = 146.87 : x
  2. Step 2: Convert to fraction form
    579.71/869.57 = 146.87/x
  3. Step 3: Cross multiply
    579.71x = 869.57 × 146.87
  4. Step 4: Simplify right side
    579.71x = 127,713.75
  5. Step 5: Solve for x
    x = 127,713.75/579.71
  6. Step 6: Final answer
    x = 220.31

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Double scale
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Similar ratio
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1.5x scale

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.