Home / 813,316.56-1,220,137.92-280,857.12

Finding the Fourth Proportional to 813,316.56, 1,220,137.92 and 280,857.12

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Solution

The fourth proportional to 813,316.56, 1,220,137.92 and 280,857.12 is: 421,342.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,316.56 : 1,220,137.92 = 280,857.12 : x
  2. Step 2: Convert to fraction form
    813,316.56/1,220,137.92 = 280,857.12/x
  3. Step 3: Cross multiply
    813,316.56x = 1,220,137.92 × 280,857.12
  4. Step 4: Simplify right side
    813,316.56x = 342,684,422,213.99
  5. Step 5: Solve for x
    x = 342,684,422,213.99/813,316.56
  6. Step 6: Final answer
    x = 421,342.00

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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.