Home / 1,638,121.70-2,457,182.55-840,960.20

Finding the Fourth Proportional to 1,638,121.70, 2,457,182.55 and 840,960.20

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Solution

The fourth proportional to 1,638,121.70, 2,457,182.55 and 840,960.20 is: 1,261,440.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638,121.70 : 2,457,182.55 = 840,960.20 : x
  2. Step 2: Convert to fraction form
    1,638,121.70/2,457,182.55 = 840,960.20/x
  3. Step 3: Cross multiply
    1,638,121.70x = 2,457,182.55 × 840,960.20
  4. Step 4: Simplify right side
    1,638,121.70x = 2,066,392,728,684.51
  5. Step 5: Solve for x
    x = 2,066,392,728,684.51/1,638,121.70
  6. Step 6: Final answer
    x = 1,261,440.30

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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.