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Finding the Third Proportional to 561.94 and 840.09

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Solution

The third proportional to 561.94 and 840.09 is: 1,255.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.94 : 840.09 = 840.09 : x
  2. Step 2: Convert to fraction form
    561.94/840.09 = 840.09/x
  3. Step 3: Cross multiply
    561.94x = 840.09 × 840.09
  4. Step 4: Simplify right side
    561.94x = 705,757.51
  5. Step 5: Solve for x
    x = 705,757.51/561.94
  6. Step 6: Final answer
    x = 1,255.94

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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.