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Finding the Fourth Proportional to 322.03, 444.79 and 278.90

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Solution

The fourth proportional to 322.03, 444.79 and 278.90 is: 385.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.03 : 444.79 = 278.90 : x
  2. Step 2: Convert to fraction form
    322.03/444.79 = 278.90/x
  3. Step 3: Cross multiply
    322.03x = 444.79 × 278.90
  4. Step 4: Simplify right side
    322.03x = 124,051.93
  5. Step 5: Solve for x
    x = 124,051.93/322.03
  6. Step 6: Final answer
    x = 385.22

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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.