Home / 638,648.20-957,918.30-195,416.20

Finding the Fourth Proportional to 638,648.20, 957,918.30 and 195,416.20

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Solution

The fourth proportional to 638,648.20, 957,918.30 and 195,416.20 is: 293,107.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,648.20 : 957,918.30 = 195,416.20 : x
  2. Step 2: Convert to fraction form
    638,648.20/957,918.30 = 195,416.20/x
  3. Step 3: Cross multiply
    638,648.20x = 957,918.30 × 195,416.20
  4. Step 4: Simplify right side
    638,648.20x = 187,192,754,096.46
  5. Step 5: Solve for x
    x = 187,192,754,096.46/638,648.20
  6. Step 6: Final answer
    x = 293,107.78

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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.