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Finding the Fourth Proportional to 654.84, 981.90 and 243.84

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Solution

The fourth proportional to 654.84, 981.90 and 243.84 is: 365.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.84 : 981.90 = 243.84 : x
  2. Step 2: Convert to fraction form
    654.84/981.90 = 243.84/x
  3. Step 3: Cross multiply
    654.84x = 981.90 × 243.84
  4. Step 4: Simplify right side
    654.84x = 239,426.50
  5. Step 5: Solve for x
    x = 239,426.50/654.84
  6. Step 6: Final answer
    x = 365.63

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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.