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Finding the Fourth Proportional to 263.33, 393.21 and 229.17

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Solution

The fourth proportional to 263.33, 393.21 and 229.17 is: 342.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.33 : 393.21 = 229.17 : x
  2. Step 2: Convert to fraction form
    263.33/393.21 = 229.17/x
  3. Step 3: Cross multiply
    263.33x = 393.21 × 229.17
  4. Step 4: Simplify right side
    263.33x = 90,111.94
  5. Step 5: Solve for x
    x = 90,111.94/263.33
  6. Step 6: Final answer
    x = 342.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.