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Finding the Fourth Proportional to 322.94, 484.35 and 140.28

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Solution

The fourth proportional to 322.94, 484.35 and 140.28 is: 210.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.94 : 484.35 = 140.28 : x
  2. Step 2: Convert to fraction form
    322.94/484.35 = 140.28/x
  3. Step 3: Cross multiply
    322.94x = 484.35 × 140.28
  4. Step 4: Simplify right side
    322.94x = 67,944.62
  5. Step 5: Solve for x
    x = 67,944.62/322.94
  6. Step 6: Final answer
    x = 210.40

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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.