Home / 638,131.28-880,627.08-351,661.64

Finding the Fourth Proportional to 638,131.28, 880,627.08 and 351,661.64

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Solution

The fourth proportional to 638,131.28, 880,627.08 and 351,661.64 is: 485,296.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,131.28 : 880,627.08 = 351,661.64 : x
  2. Step 2: Convert to fraction form
    638,131.28/880,627.08 = 351,661.64/x
  3. Step 3: Cross multiply
    638,131.28x = 880,627.08 × 351,661.64
  4. Step 4: Simplify right side
    638,131.28x = 309,682,763,181.21
  5. Step 5: Solve for x
    x = 309,682,763,181.21/638,131.28
  6. Step 6: Final answer
    x = 485,296.32

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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.