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Finding the Third Proportional to 426.94 and 554.34

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Solution

The third proportional to 426.94 and 554.34 is: 719.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.94 : 554.34 = 554.34 : x
  2. Step 2: Convert to fraction form
    426.94/554.34 = 554.34/x
  3. Step 3: Cross multiply
    426.94x = 554.34 × 554.34
  4. Step 4: Simplify right side
    426.94x = 307,296.99
  5. Step 5: Solve for x
    x = 307,296.99/426.94
  6. Step 6: Final answer
    x = 719.77

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.