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Finding the Fourth Proportional to 638,133.40, 957,200.10 and 354,698.20

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Solution

The fourth proportional to 638,133.40, 957,200.10 and 354,698.20 is: 532,047.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,133.40 : 957,200.10 = 354,698.20 : x
  2. Step 2: Convert to fraction form
    638,133.40/957,200.10 = 354,698.20/x
  3. Step 3: Cross multiply
    638,133.40x = 957,200.10 × 354,698.20
  4. Step 4: Simplify right side
    638,133.40x = 339,517,152,509.82
  5. Step 5: Solve for x
    x = 339,517,152,509.82/638,133.40
  6. Step 6: Final answer
    x = 532,047.30

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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.