Home / 840,405.88-1,260,619.76-279,440.38

Finding the Fourth Proportional to 840,405.88, 1,260,619.76 and 279,440.38

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Solution

The fourth proportional to 840,405.88, 1,260,619.76 and 279,440.38 is: 419,164.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,405.88 : 1,260,619.76 = 279,440.38 : x
  2. Step 2: Convert to fraction form
    840,405.88/1,260,619.76 = 279,440.38/x
  3. Step 3: Cross multiply
    840,405.88x = 1,260,619.76 × 279,440.38
  4. Step 4: Simplify right side
    840,405.88x = 352,268,064,769.91
  5. Step 5: Solve for x
    x = 352,268,064,769.91/840,405.88
  6. Step 6: Final answer
    x = 419,164.21

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1.5x scale

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.