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Finding the Fourth Proportional to 402.25, 555.08 and 236.45

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Solution

The fourth proportional to 402.25, 555.08 and 236.45 is: 326.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.25 : 555.08 = 236.45 : x
  2. Step 2: Convert to fraction form
    402.25/555.08 = 236.45/x
  3. Step 3: Cross multiply
    402.25x = 555.08 × 236.45
  4. Step 4: Simplify right side
    402.25x = 131,247.48
  5. Step 5: Solve for x
    x = 131,247.48/402.25
  6. Step 6: Final answer
    x = 326.29

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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.