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Finding the Fourth Proportional to 322.72, 483.98 and 127.64

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Solution

The fourth proportional to 322.72, 483.98 and 127.64 is: 191.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.72 : 483.98 = 127.64 : x
  2. Step 2: Convert to fraction form
    322.72/483.98 = 127.64/x
  3. Step 3: Cross multiply
    322.72x = 483.98 × 127.64
  4. Step 4: Simplify right side
    322.72x = 61,775.78
  5. Step 5: Solve for x
    x = 61,775.78/322.72
  6. Step 6: Final answer
    x = 191.42

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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.