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Finding the Fourth Proportional to 522.99, 721.88 and 323.88

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Solution

The fourth proportional to 522.99, 721.88 and 323.88 is: 447.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.99 : 721.88 = 323.88 : x
  2. Step 2: Convert to fraction form
    522.99/721.88 = 323.88/x
  3. Step 3: Cross multiply
    522.99x = 721.88 × 323.88
  4. Step 4: Simplify right side
    522.99x = 233,802.49
  5. Step 5: Solve for x
    x = 233,802.49/522.99
  6. Step 6: Final answer
    x = 447.05

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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.