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Finding the Fourth Proportional to 322.79, 445.76 and 275.89

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Solution

The fourth proportional to 322.79, 445.76 and 275.89 is: 380.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.79 : 445.76 = 275.89 : x
  2. Step 2: Convert to fraction form
    322.79/445.76 = 275.89/x
  3. Step 3: Cross multiply
    322.79x = 445.76 × 275.89
  4. Step 4: Simplify right side
    322.79x = 122,980.73
  5. Step 5: Solve for x
    x = 122,980.73/322.79
  6. Step 6: Final answer
    x = 380.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.