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Finding the Fourth Proportional to 379.65, 569.30 and 223.55

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Solution

The fourth proportional to 379.65, 569.30 and 223.55 is: 335.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.65 : 569.30 = 223.55 : x
  2. Step 2: Convert to fraction form
    379.65/569.30 = 223.55/x
  3. Step 3: Cross multiply
    379.65x = 569.30 × 223.55
  4. Step 4: Simplify right side
    379.65x = 127,263.05
  5. Step 5: Solve for x
    x = 127,263.05/379.65
  6. Step 6: Final answer
    x = 335.21

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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.