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Finding the Fourth Proportional to 654.91, 981.65 and 330.30

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Solution

The fourth proportional to 654.91, 981.65 and 330.30 is: 495.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.91 : 981.65 = 330.30 : x
  2. Step 2: Convert to fraction form
    654.91/981.65 = 330.30/x
  3. Step 3: Cross multiply
    654.91x = 981.65 × 330.30
  4. Step 4: Simplify right side
    654.91x = 324,239.82
  5. Step 5: Solve for x
    x = 324,239.82/654.91
  6. Step 6: Final answer
    x = 495.09

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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.