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Finding the Fourth Proportional to 654.52, 981.78 and 330.16

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Solution

The fourth proportional to 654.52, 981.78 and 330.16 is: 495.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.52 : 981.78 = 330.16 : x
  2. Step 2: Convert to fraction form
    654.52/981.78 = 330.16/x
  3. Step 3: Cross multiply
    654.52x = 981.78 × 330.16
  4. Step 4: Simplify right side
    654.52x = 324,144.48
  5. Step 5: Solve for x
    x = 324,144.48/654.52
  6. Step 6: Final answer
    x = 495.24

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Double scale
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Similar ratio
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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.