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Finding the Third Proportional to 621 and 1,360.63

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Solution

The third proportional to 621 and 1,360.63 is: 2,981.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    621 : 1,360.63 = 1,360.63 : x
  2. Step 2: Convert to fraction form
    621/1,360.63 = 1,360.63/x
  3. Step 3: Cross multiply
    621x = 1,360.63 × 1,360.63
  4. Step 4: Simplify right side
    621x = 1,851,300.39
  5. Step 5: Solve for x
    x = 1,851,300.39/621
  6. Step 6: Final answer
    x = 2,981.16

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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.