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Finding the Third Proportional to 278.60 and 522.07

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Solution

The third proportional to 278.60 and 522.07 is: 978.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.60 : 522.07 = 522.07 : x
  2. Step 2: Convert to fraction form
    278.60/522.07 = 522.07/x
  3. Step 3: Cross multiply
    278.60x = 522.07 × 522.07
  4. Step 4: Simplify right side
    278.60x = 272,557.41
  5. Step 5: Solve for x
    x = 272,557.41/278.60
  6. Step 6: Final answer
    x = 978.33

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Why These Related Problems?

These problems maintain the same ratio (1.87) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.