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Finding the Fourth Proportional to 330.84, 455.22 and 322.36

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Solution

The fourth proportional to 330.84, 455.22 and 322.36 is: 443.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.84 : 455.22 = 322.36 : x
  2. Step 2: Convert to fraction form
    330.84/455.22 = 322.36/x
  3. Step 3: Cross multiply
    330.84x = 455.22 × 322.36
  4. Step 4: Simplify right side
    330.84x = 146,744.72
  5. Step 5: Solve for x
    x = 146,744.72/330.84
  6. Step 6: Final answer
    x = 443.55

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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.