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Finding the Fourth Proportional to 223.70, 308.57 and 208.07

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Solution

The fourth proportional to 223.70, 308.57 and 208.07 is: 287.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.70 : 308.57 = 208.07 : x
  2. Step 2: Convert to fraction form
    223.70/308.57 = 208.07/x
  3. Step 3: Cross multiply
    223.70x = 308.57 × 208.07
  4. Step 4: Simplify right side
    223.70x = 64,201.58
  5. Step 5: Solve for x
    x = 64,201.58/223.70
  6. Step 6: Final answer
    x = 287.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.