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Finding the Fourth Proportional to 243.96, 336.72 and 145.80

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Solution

The fourth proportional to 243.96, 336.72 and 145.80 is: 201.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.96 : 336.72 = 145.80 : x
  2. Step 2: Convert to fraction form
    243.96/336.72 = 145.80/x
  3. Step 3: Cross multiply
    243.96x = 336.72 × 145.80
  4. Step 4: Simplify right side
    243.96x = 49,093.78
  5. Step 5: Solve for x
    x = 49,093.78/243.96
  6. Step 6: Final answer
    x = 201.24

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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.