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Finding the Third Proportional to 1,430 and 2,217.75

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Solution

The third proportional to 1,430 and 2,217.75 is: 3,439.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430 : 2,217.75 = 2,217.75 : x
  2. Step 2: Convert to fraction form
    1,430/2,217.75 = 2,217.75/x
  3. Step 3: Cross multiply
    1,430x = 2,217.75 × 2,217.75
  4. Step 4: Simplify right side
    1,430x = 4,918,415.06
  5. Step 5: Solve for x
    x = 4,918,415.06/1,430
  6. Step 6: Final answer
    x = 3,439.45

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.