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Finding the Fourth Proportional to 497.44, 686.64 and 323.20

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Solution

The fourth proportional to 497.44, 686.64 and 323.20 is: 446.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.44 : 686.64 = 323.20 : x
  2. Step 2: Convert to fraction form
    497.44/686.64 = 323.20/x
  3. Step 3: Cross multiply
    497.44x = 686.64 × 323.20
  4. Step 4: Simplify right side
    497.44x = 221,922.05
  5. Step 5: Solve for x
    x = 221,922.05/497.44
  6. Step 6: Final answer
    x = 446.13

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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.