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Finding the Third Proportional to 1,390.50 and 2,710.13

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Solution

The third proportional to 1,390.50 and 2,710.13 is: 5,282.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.50 : 2,710.13 = 2,710.13 : x
  2. Step 2: Convert to fraction form
    1,390.50/2,710.13 = 2,710.13/x
  3. Step 3: Cross multiply
    1,390.50x = 2,710.13 × 2,710.13
  4. Step 4: Simplify right side
    1,390.50x = 7,344,777.52
  5. Step 5: Solve for x
    x = 7,344,777.52/1,390.50
  6. Step 6: Final answer
    x = 5,282.11

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Why These Related Problems?

These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.