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Finding the Fourth Proportional to 235.13, 324.49 and 156.30

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Solution

The fourth proportional to 235.13, 324.49 and 156.30 is: 215.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.13 : 324.49 = 156.30 : x
  2. Step 2: Convert to fraction form
    235.13/324.49 = 156.30/x
  3. Step 3: Cross multiply
    235.13x = 324.49 × 156.30
  4. Step 4: Simplify right side
    235.13x = 50,717.79
  5. Step 5: Solve for x
    x = 50,717.79/235.13
  6. Step 6: Final answer
    x = 215.70

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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.