Home / 812,755.06-1,219,190.98-280,268.40

Finding the Fourth Proportional to 812,755.06, 1,219,190.98 and 280,268.40

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Solution

The fourth proportional to 812,755.06, 1,219,190.98 and 280,268.40 is: 420,422.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,755.06 : 1,219,190.98 = 280,268.40 : x
  2. Step 2: Convert to fraction form
    812,755.06/1,219,190.98 = 280,268.40/x
  3. Step 3: Cross multiply
    812,755.06x = 1,219,190.98 × 280,268.40
  4. Step 4: Simplify right side
    812,755.06x = 341,700,705,259.03
  5. Step 5: Solve for x
    x = 341,700,705,259.03/812,755.06
  6. Step 6: Final answer
    x = 420,422.74

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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.