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Finding the Third Proportional to 569.25 and 1,390.78

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Solution

The third proportional to 569.25 and 1,390.78 is: 3,397.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.25 : 1,390.78 = 1,390.78 : x
  2. Step 2: Convert to fraction form
    569.25/1,390.78 = 1,390.78/x
  3. Step 3: Cross multiply
    569.25x = 1,390.78 × 1,390.78
  4. Step 4: Simplify right side
    569.25x = 1,934,272.49
  5. Step 5: Solve for x
    x = 1,934,272.49/569.25
  6. Step 6: Final answer
    x = 3,397.93

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Why These Related Problems?

These problems maintain the same ratio (2.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.