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Finding the Third Proportional to 289.83 and 394.88

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Solution

The third proportional to 289.83 and 394.88 is: 538.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.83 : 394.88 = 394.88 : x
  2. Step 2: Convert to fraction form
    289.83/394.88 = 394.88/x
  3. Step 3: Cross multiply
    289.83x = 394.88 × 394.88
  4. Step 4: Simplify right side
    289.83x = 155,926.27
  5. Step 5: Solve for x
    x = 155,926.27/289.83
  6. Step 6: Final answer
    x = 538.00

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.