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Finding the Fourth Proportional to 322.16, 483.30 and 206.72

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Solution

The fourth proportional to 322.16, 483.30 and 206.72 is: 310.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.16 : 483.30 = 206.72 : x
  2. Step 2: Convert to fraction form
    322.16/483.30 = 206.72/x
  3. Step 3: Cross multiply
    322.16x = 483.30 × 206.72
  4. Step 4: Simplify right side
    322.16x = 99,907.78
  5. Step 5: Solve for x
    x = 99,907.78/322.16
  6. Step 6: Final answer
    x = 310.12

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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.