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Finding the Fourth Proportional to 379.99, 570.26 and 187.75

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Solution

The fourth proportional to 379.99, 570.26 and 187.75 is: 281.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.99 : 570.26 = 187.75 : x
  2. Step 2: Convert to fraction form
    379.99/570.26 = 187.75/x
  3. Step 3: Cross multiply
    379.99x = 570.26 × 187.75
  4. Step 4: Simplify right side
    379.99x = 107,066.32
  5. Step 5: Solve for x
    x = 107,066.32/379.99
  6. Step 6: Final answer
    x = 281.76

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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.