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Finding the Fourth Proportional to 322.11, 482.67 and 253.35

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Solution

The fourth proportional to 322.11, 482.67 and 253.35 is: 379.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.11 : 482.67 = 253.35 : x
  2. Step 2: Convert to fraction form
    322.11/482.67 = 253.35/x
  3. Step 3: Cross multiply
    322.11x = 482.67 × 253.35
  4. Step 4: Simplify right side
    322.11x = 122,284.44
  5. Step 5: Solve for x
    x = 122,284.44/322.11
  6. Step 6: Final answer
    x = 379.64

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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.