Home / 828,081.78-1,241,236.80-428,320.08

Finding the Fourth Proportional to 828,081.78, 1,241,236.80 and 428,320.08

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Solution

The fourth proportional to 828,081.78, 1,241,236.80 and 428,320.08 is: 642,021.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,081.78 : 1,241,236.80 = 428,320.08 : x
  2. Step 2: Convert to fraction form
    828,081.78/1,241,236.80 = 428,320.08/x
  3. Step 3: Cross multiply
    828,081.78x = 1,241,236.80 × 428,320.08
  4. Step 4: Simplify right side
    828,081.78x = 531,646,645,474.94
  5. Step 5: Solve for x
    x = 531,646,645,474.94/828,081.78
  6. Step 6: Final answer
    x = 642,021.91

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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.