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Finding the Third Proportional to 621.66 and 947.81

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Solution

The third proportional to 621.66 and 947.81 is: 1,445.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.66 : 947.81 = 947.81 : x
  2. Step 2: Convert to fraction form
    621.66/947.81 = 947.81/x
  3. Step 3: Cross multiply
    621.66x = 947.81 × 947.81
  4. Step 4: Simplify right side
    621.66x = 898,348.54
  5. Step 5: Solve for x
    x = 898,348.54/621.66
  6. Step 6: Final answer
    x = 1,445.09

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.