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Finding the Fourth Proportional to 322.51, 444.95 and 239.76

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Solution

The fourth proportional to 322.51, 444.95 and 239.76 is: 330.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.51 : 444.95 = 239.76 : x
  2. Step 2: Convert to fraction form
    322.51/444.95 = 239.76/x
  3. Step 3: Cross multiply
    322.51x = 444.95 × 239.76
  4. Step 4: Simplify right side
    322.51x = 106,681.21
  5. Step 5: Solve for x
    x = 106,681.21/322.51
  6. Step 6: Final answer
    x = 330.78

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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.