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Finding the Fourth Proportional to 379.42, 569.30 and 225.65

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Solution

The fourth proportional to 379.42, 569.30 and 225.65 is: 338.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.42 : 569.30 = 225.65 : x
  2. Step 2: Convert to fraction form
    379.42/569.30 = 225.65/x
  3. Step 3: Cross multiply
    379.42x = 569.30 × 225.65
  4. Step 4: Simplify right side
    379.42x = 128,462.55
  5. Step 5: Solve for x
    x = 128,462.55/379.42
  6. Step 6: Final answer
    x = 338.58

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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.