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Finding the Fourth Proportional to 654.50, 981.25 and 243.56

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Solution

The fourth proportional to 654.50, 981.25 and 243.56 is: 365.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.50 : 981.25 = 243.56 : x
  2. Step 2: Convert to fraction form
    654.50/981.25 = 243.56/x
  3. Step 3: Cross multiply
    654.50x = 981.25 × 243.56
  4. Step 4: Simplify right side
    654.50x = 238,993.25
  5. Step 5: Solve for x
    x = 238,993.25/654.50
  6. Step 6: Final answer
    x = 365.15

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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.