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Finding the Fourth Proportional to 379.69, 569.73 and 187.31

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Solution

The fourth proportional to 379.69, 569.73 and 187.31 is: 281.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.69 : 569.73 = 187.31 : x
  2. Step 2: Convert to fraction form
    379.69/569.73 = 187.31/x
  3. Step 3: Cross multiply
    379.69x = 569.73 × 187.31
  4. Step 4: Simplify right side
    379.69x = 106,718.25
  5. Step 5: Solve for x
    x = 106,718.25/379.69
  6. Step 6: Final answer
    x = 281.07

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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.