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Finding the Fourth Proportional to 579.49, 869.27 and 214.25

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Solution

The fourth proportional to 579.49, 869.27 and 214.25 is: 321.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.49 : 869.27 = 214.25 : x
  2. Step 2: Convert to fraction form
    579.49/869.27 = 214.25/x
  3. Step 3: Cross multiply
    579.49x = 869.27 × 214.25
  4. Step 4: Simplify right side
    579.49x = 186,235.68
  5. Step 5: Solve for x
    x = 186,235.68/579.49
  6. Step 6: Final answer
    x = 321.38

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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.