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Finding the Third Proportional to 558.38 and 1,220.63

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Solution

The third proportional to 558.38 and 1,220.63 is: 2,668.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.38 : 1,220.63 = 1,220.63 : x
  2. Step 2: Convert to fraction form
    558.38/1,220.63 = 1,220.63/x
  3. Step 3: Cross multiply
    558.38x = 1,220.63 × 1,220.63
  4. Step 4: Simplify right side
    558.38x = 1,489,925.39
  5. Step 5: Solve for x
    x = 1,489,925.39/558.38
  6. Step 6: Final answer
    x = 2,668.32

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.