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Finding the Fourth Proportional to 322.72, 485.25 and 297.36

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Solution

The fourth proportional to 322.72, 485.25 and 297.36 is: 447.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.72 : 485.25 = 297.36 : x
  2. Step 2: Convert to fraction form
    322.72/485.25 = 297.36/x
  3. Step 3: Cross multiply
    322.72x = 485.25 × 297.36
  4. Step 4: Simplify right side
    322.72x = 144,291.51
  5. Step 5: Solve for x
    x = 144,291.51/322.72
  6. Step 6: Final answer
    x = 447.11

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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.