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Finding the Third Proportional to 149 and 278.50

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Solution

The third proportional to 149 and 278.50 is: 520.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    149 : 278.50 = 278.50 : x
  2. Step 2: Convert to fraction form
    149/278.50 = 278.50/x
  3. Step 3: Cross multiply
    149x = 278.50 × 278.50
  4. Step 4: Simplify right side
    149x = 77,562.25
  5. Step 5: Solve for x
    x = 77,562.25/149
  6. Step 6: Final answer
    x = 520.55

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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.