Home / 812,138.40-1,218,207.60-251,172.90

Finding the Fourth Proportional to 812,138.40, 1,218,207.60 and 251,172.90

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Solution

The fourth proportional to 812,138.40, 1,218,207.60 and 251,172.90 is: 376,759.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,138.40 : 1,218,207.60 = 251,172.90 : x
  2. Step 2: Convert to fraction form
    812,138.40/1,218,207.60 = 251,172.90/x
  3. Step 3: Cross multiply
    812,138.40x = 1,218,207.60 × 251,172.90
  4. Step 4: Simplify right side
    812,138.40x = 305,980,735,694.04
  5. Step 5: Solve for x
    x = 305,980,735,694.04/812,138.40
  6. Step 6: Final answer
    x = 376,759.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.