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Finding the Third Proportional to 278.63 and 603.38

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Solution

The third proportional to 278.63 and 603.38 is: 1,306.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.63 : 603.38 = 603.38 : x
  2. Step 2: Convert to fraction form
    278.63/603.38 = 603.38/x
  3. Step 3: Cross multiply
    278.63x = 603.38 × 603.38
  4. Step 4: Simplify right side
    278.63x = 364,061.39
  5. Step 5: Solve for x
    x = 364,061.39/278.63
  6. Step 6: Final answer
    x = 1,306.64

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.