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Finding the Third Proportional to 210 and 277.50

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Solution

The third proportional to 210 and 277.50 is: 366.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    210 : 277.50 = 277.50 : x
  2. Step 2: Convert to fraction form
    210/277.50 = 277.50/x
  3. Step 3: Cross multiply
    210x = 277.50 × 277.50
  4. Step 4: Simplify right side
    210x = 77,006.25
  5. Step 5: Solve for x
    x = 77,006.25/210
  6. Step 6: Final answer
    x = 366.70

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These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.