Home / 821,203.60-1,231,805.40-485,280.40

Finding the Fourth Proportional to 821,203.60, 1,231,805.40 and 485,280.40

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Solution

The fourth proportional to 821,203.60, 1,231,805.40 and 485,280.40 is: 727,920.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,203.60 : 1,231,805.40 = 485,280.40 : x
  2. Step 2: Convert to fraction form
    821,203.60/1,231,805.40 = 485,280.40/x
  3. Step 3: Cross multiply
    821,203.60x = 1,231,805.40 × 485,280.40
  4. Step 4: Simplify right side
    821,203.60x = 597,771,017,234.16
  5. Step 5: Solve for x
    x = 597,771,017,234.16/821,203.60
  6. Step 6: Final answer
    x = 727,920.60

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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.