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Finding the Fourth Proportional to 235.80, 325.40 and 141.30

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Solution

The fourth proportional to 235.80, 325.40 and 141.30 is: 194.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.80 : 325.40 = 141.30 : x
  2. Step 2: Convert to fraction form
    235.80/325.40 = 141.30/x
  3. Step 3: Cross multiply
    235.80x = 325.40 × 141.30
  4. Step 4: Simplify right side
    235.80x = 45,978.31
  5. Step 5: Solve for x
    x = 45,978.31/235.80
  6. Step 6: Final answer
    x = 194.99

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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.