Home / 820,391.40-1,230,587.10-610,439.40

Finding the Fourth Proportional to 820,391.40, 1,230,587.10 and 610,439.40

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Solution

The fourth proportional to 820,391.40, 1,230,587.10 and 610,439.40 is: 915,659.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,391.40 : 1,230,587.10 = 610,439.40 : x
  2. Step 2: Convert to fraction form
    820,391.40/1,230,587.10 = 610,439.40/x
  3. Step 3: Cross multiply
    820,391.40x = 1,230,587.10 × 610,439.40
  4. Step 4: Simplify right side
    820,391.40x = 751,198,850,971.74
  5. Step 5: Solve for x
    x = 751,198,850,971.74/820,391.40
  6. Step 6: Final answer
    x = 915,659.10

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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.