Home / 781,201-1,078,172.42-494,747.72

Finding the Fourth Proportional to 781,201, 1,078,172.42 and 494,747.72

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Solution

The fourth proportional to 781,201, 1,078,172.42 and 494,747.72 is: 682,824.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,201 : 1,078,172.42 = 494,747.72 : x
  2. Step 2: Convert to fraction form
    781,201/1,078,172.42 = 494,747.72/x
  3. Step 3: Cross multiply
    781,201x = 1,078,172.42 × 494,747.72
  4. Step 4: Simplify right side
    781,201x = 533,423,346,561.88
  5. Step 5: Solve for x
    x = 533,423,346,561.88/781,201
  6. Step 6: Final answer
    x = 682,824.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.