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Finding the Fourth Proportional to 235.91, 354.15 and 153.38

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Solution

The fourth proportional to 235.91, 354.15 and 153.38 is: 230.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.91 : 354.15 = 153.38 : x
  2. Step 2: Convert to fraction form
    235.91/354.15 = 153.38/x
  3. Step 3: Cross multiply
    235.91x = 354.15 × 153.38
  4. Step 4: Simplify right side
    235.91x = 54,320.41
  5. Step 5: Solve for x
    x = 54,320.41/235.91
  6. Step 6: Final answer
    x = 230.26

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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.