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Finding the Fourth Proportional to 579.15, 868.21 and 254.26

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Solution

The fourth proportional to 579.15, 868.21 and 254.26 is: 381.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.15 : 868.21 = 254.26 : x
  2. Step 2: Convert to fraction form
    579.15/868.21 = 254.26/x
  3. Step 3: Cross multiply
    579.15x = 868.21 × 254.26
  4. Step 4: Simplify right side
    579.15x = 220,751.07
  5. Step 5: Solve for x
    x = 220,751.07/579.15
  6. Step 6: Final answer
    x = 381.16

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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.