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Finding the Third Proportional to 261.25 and 568.63

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Solution

The third proportional to 261.25 and 568.63 is: 1,237.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.25 : 568.63 = 568.63 : x
  2. Step 2: Convert to fraction form
    261.25/568.63 = 568.63/x
  3. Step 3: Cross multiply
    261.25x = 568.63 × 568.63
  4. Step 4: Simplify right side
    261.25x = 323,334.39
  5. Step 5: Solve for x
    x = 323,334.39/261.25
  6. Step 6: Final answer
    x = 1,237.64

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.