Home / 828,018.80-1,242,028.20-820,145.60

Finding the Fourth Proportional to 828,018.80, 1,242,028.20 and 820,145.60

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Solution

The fourth proportional to 828,018.80, 1,242,028.20 and 820,145.60 is: 1,230,218.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,018.80 : 1,242,028.20 = 820,145.60 : x
  2. Step 2: Convert to fraction form
    828,018.80/1,242,028.20 = 820,145.60/x
  3. Step 3: Cross multiply
    828,018.80x = 1,242,028.20 × 820,145.60
  4. Step 4: Simplify right side
    828,018.80x = 1,018,643,963,305.92
  5. Step 5: Solve for x
    x = 1,018,643,963,305.92/828,018.80
  6. Step 6: Final answer
    x = 1,230,218.40

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Double scale
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Similar ratio
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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.