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Finding the Third Proportional to 939.09 and 1,430.79

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Solution

The third proportional to 939.09 and 1,430.79 is: 2,179.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.09 : 1,430.79 = 1,430.79 : x
  2. Step 2: Convert to fraction form
    939.09/1,430.79 = 1,430.79/x
  3. Step 3: Cross multiply
    939.09x = 1,430.79 × 1,430.79
  4. Step 4: Simplify right side
    939.09x = 2,047,157.34
  5. Step 5: Solve for x
    x = 2,047,157.34/939.09
  6. Step 6: Final answer
    x = 2,179.93

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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.