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Finding the Fourth Proportional to 579.42, 869.13 and 254.79

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Solution

The fourth proportional to 579.42, 869.13 and 254.79 is: 382.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.42 : 869.13 = 254.79 : x
  2. Step 2: Convert to fraction form
    579.42/869.13 = 254.79/x
  3. Step 3: Cross multiply
    579.42x = 869.13 × 254.79
  4. Step 4: Simplify right side
    579.42x = 221,445.63
  5. Step 5: Solve for x
    x = 221,445.63/579.42
  6. Step 6: Final answer
    x = 382.19

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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.