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Finding the Third Proportional to 315,079.50 and 691,388.25

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Solution

The third proportional to 315,079.50 and 691,388.25 is: 1,517,133.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,079.50 : 691,388.25 = 691,388.25 : x
  2. Step 2: Convert to fraction form
    315,079.50/691,388.25 = 691,388.25/x
  3. Step 3: Cross multiply
    315,079.50x = 691,388.25 × 691,388.25
  4. Step 4: Simplify right side
    315,079.50x = 478,017,712,238.06
  5. Step 5: Solve for x
    x = 478,017,712,238.06/315,079.50
  6. Step 6: Final answer
    x = 1,517,133.65

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.