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Finding the Third Proportional to 753.19 and 1,121.81

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Solution

The third proportional to 753.19 and 1,121.81 is: 1,670.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.19 : 1,121.81 = 1,121.81 : x
  2. Step 2: Convert to fraction form
    753.19/1,121.81 = 1,121.81/x
  3. Step 3: Cross multiply
    753.19x = 1,121.81 × 1,121.81
  4. Step 4: Simplify right side
    753.19x = 1,258,463.29
  5. Step 5: Solve for x
    x = 1,258,463.29/753.19
  6. Step 6: Final answer
    x = 1,670.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.