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Finding the Fourth Proportional to 380.57, 570.55 and 218.37

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Solution

The fourth proportional to 380.57, 570.55 and 218.37 is: 327.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.57 : 570.55 = 218.37 : x
  2. Step 2: Convert to fraction form
    380.57/570.55 = 218.37/x
  3. Step 3: Cross multiply
    380.57x = 570.55 × 218.37
  4. Step 4: Simplify right side
    380.57x = 124,591.00
  5. Step 5: Solve for x
    x = 124,591.00/380.57
  6. Step 6: Final answer
    x = 327.38

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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.