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Finding the Fourth Proportional to 236.41, 354.65 and 99.45

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Solution

The fourth proportional to 236.41, 354.65 and 99.45 is: 149.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.41 : 354.65 = 99.45 : x
  2. Step 2: Convert to fraction form
    236.41/354.65 = 99.45/x
  3. Step 3: Cross multiply
    236.41x = 354.65 × 99.45
  4. Step 4: Simplify right side
    236.41x = 35,269.94
  5. Step 5: Solve for x
    x = 35,269.94/236.41
  6. Step 6: Final answer
    x = 149.19

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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.