Home / 621,738.20-857,998.70-353,466.20

Finding the Fourth Proportional to 621,738.20, 857,998.70 and 353,466.20

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Solution

The fourth proportional to 621,738.20, 857,998.70 and 353,466.20 is: 487,783.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,738.20 : 857,998.70 = 353,466.20 : x
  2. Step 2: Convert to fraction form
    621,738.20/857,998.70 = 353,466.20/x
  3. Step 3: Cross multiply
    621,738.20x = 857,998.70 × 353,466.20
  4. Step 4: Simplify right side
    621,738.20x = 303,273,534,036.62
  5. Step 5: Solve for x
    x = 303,273,534,036.62/621,738.20
  6. Step 6: Final answer
    x = 487,783.34

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.