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Finding the Fourth Proportional to 423.28, 584.05 and 236.77

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Solution

The fourth proportional to 423.28, 584.05 and 236.77 is: 326.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.28 : 584.05 = 236.77 : x
  2. Step 2: Convert to fraction form
    423.28/584.05 = 236.77/x
  3. Step 3: Cross multiply
    423.28x = 584.05 × 236.77
  4. Step 4: Simplify right side
    423.28x = 138,287.86
  5. Step 5: Solve for x
    x = 138,287.86/423.28
  6. Step 6: Final answer
    x = 326.70

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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.