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Finding the Third Proportional to 412,881.75 and 638,116.88

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Solution

The third proportional to 412,881.75 and 638,116.88 is: 986,222.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,881.75 : 638,116.88 = 638,116.88 : x
  2. Step 2: Convert to fraction form
    412,881.75/638,116.88 = 638,116.88/x
  3. Step 3: Cross multiply
    412,881.75x = 638,116.88 × 638,116.88
  4. Step 4: Simplify right side
    412,881.75x = 407,193,146,159.77
  5. Step 5: Solve for x
    x = 407,193,146,159.77/412,881.75
  6. Step 6: Final answer
    x = 986,222.20

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.