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Finding the Fourth Proportional to 208.57, 313.44 and 186.07

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Solution

The fourth proportional to 208.57, 313.44 and 186.07 is: 279.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.57 : 313.44 = 186.07 : x
  2. Step 2: Convert to fraction form
    208.57/313.44 = 186.07/x
  3. Step 3: Cross multiply
    208.57x = 313.44 × 186.07
  4. Step 4: Simplify right side
    208.57x = 58,321.78
  5. Step 5: Solve for x
    x = 58,321.78/208.57
  6. Step 6: Final answer
    x = 279.63

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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.