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Finding the Fourth Proportional to 235.88, 325.05 and 209.45

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Solution

The fourth proportional to 235.88, 325.05 and 209.45 is: 288.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.88 : 325.05 = 209.45 : x
  2. Step 2: Convert to fraction form
    235.88/325.05 = 209.45/x
  3. Step 3: Cross multiply
    235.88x = 325.05 × 209.45
  4. Step 4: Simplify right side
    235.88x = 68,080.10
  5. Step 5: Solve for x
    x = 68,080.10/235.88
  6. Step 6: Final answer
    x = 288.63

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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.