Home / 638,904.20-958,356.30-189,694.40

Finding the Fourth Proportional to 638,904.20, 958,356.30 and 189,694.40

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Solution

The fourth proportional to 638,904.20, 958,356.30 and 189,694.40 is: 284,541.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,904.20 : 958,356.30 = 189,694.40 : x
  2. Step 2: Convert to fraction form
    638,904.20/958,356.30 = 189,694.40/x
  3. Step 3: Cross multiply
    638,904.20x = 958,356.30 × 189,694.40
  4. Step 4: Simplify right side
    638,904.20x = 181,794,823,314.72
  5. Step 5: Solve for x
    x = 181,794,823,314.72/638,904.20
  6. Step 6: Final answer
    x = 284,541.60

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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.