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Finding the Fourth Proportional to 323.74, 485.12 and 215.14

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Solution

The fourth proportional to 323.74, 485.12 and 215.14 is: 322.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.74 : 485.12 = 215.14 : x
  2. Step 2: Convert to fraction form
    323.74/485.12 = 215.14/x
  3. Step 3: Cross multiply
    323.74x = 485.12 × 215.14
  4. Step 4: Simplify right side
    323.74x = 104,368.72
  5. Step 5: Solve for x
    x = 104,368.72/323.74
  6. Step 6: Final answer
    x = 322.38

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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.