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Finding the Fourth Proportional to 654.50, 981.68 and 243.63

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Solution

The fourth proportional to 654.50, 981.68 and 243.63 is: 365.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.50 : 981.68 = 243.63 : x
  2. Step 2: Convert to fraction form
    654.50/981.68 = 243.63/x
  3. Step 3: Cross multiply
    654.50x = 981.68 × 243.63
  4. Step 4: Simplify right side
    654.50x = 239,165.48
  5. Step 5: Solve for x
    x = 239,165.48/654.50
  6. Step 6: Final answer
    x = 365.42

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1.5x scale

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.