Home / 828,086.80-1,241,244.32-428,325.12

Finding the Fourth Proportional to 828,086.80, 1,241,244.32 and 428,325.12

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Solution

The fourth proportional to 828,086.80, 1,241,244.32 and 428,325.12 is: 642,029.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,086.80 : 1,241,244.32 = 428,325.12 : x
  2. Step 2: Convert to fraction form
    828,086.80/1,241,244.32 = 428,325.12/x
  3. Step 3: Cross multiply
    828,086.80x = 1,241,244.32 × 428,325.12
  4. Step 4: Simplify right side
    828,086.80x = 531,656,122,313.32
  5. Step 5: Solve for x
    x = 531,656,122,313.32/828,086.80
  6. Step 6: Final answer
    x = 642,029.46

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Double scale
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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.