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Finding the Fourth Proportional to 236.29, 354.51 and 90.13

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Solution

The fourth proportional to 236.29, 354.51 and 90.13 is: 135.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.29 : 354.51 = 90.13 : x
  2. Step 2: Convert to fraction form
    236.29/354.51 = 90.13/x
  3. Step 3: Cross multiply
    236.29x = 354.51 × 90.13
  4. Step 4: Simplify right side
    236.29x = 31,951.99
  5. Step 5: Solve for x
    x = 31,951.99/236.29
  6. Step 6: Final answer
    x = 135.22

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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.