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Finding the Fourth Proportional to 379.80, 569.88 and 187.56

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Solution

The fourth proportional to 379.80, 569.88 and 187.56 is: 281.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.80 : 569.88 = 187.56 : x
  2. Step 2: Convert to fraction form
    379.80/569.88 = 187.56/x
  3. Step 3: Cross multiply
    379.80x = 569.88 × 187.56
  4. Step 4: Simplify right side
    379.80x = 106,886.69
  5. Step 5: Solve for x
    x = 106,886.69/379.80
  6. Step 6: Final answer
    x = 281.43

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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.