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Finding the Third Proportional to 571.13 and 981.38

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Solution

The third proportional to 571.13 and 981.38 is: 1,686.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.13 : 981.38 = 981.38 : x
  2. Step 2: Convert to fraction form
    571.13/981.38 = 981.38/x
  3. Step 3: Cross multiply
    571.13x = 981.38 × 981.38
  4. Step 4: Simplify right side
    571.13x = 963,096.89
  5. Step 5: Solve for x
    x = 963,096.89/571.13
  6. Step 6: Final answer
    x = 1,686.32

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Why These Related Problems?

These problems maintain the same ratio (1.72) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.