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Finding the Fourth Proportional to 638,078.40, 957,117.60 and 357,559.20

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Solution

The fourth proportional to 638,078.40, 957,117.60 and 357,559.20 is: 536,338.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,078.40 : 957,117.60 = 357,559.20 : x
  2. Step 2: Convert to fraction form
    638,078.40/957,117.60 = 357,559.20/x
  3. Step 3: Cross multiply
    638,078.40x = 957,117.60 × 357,559.20
  4. Step 4: Simplify right side
    638,078.40x = 342,226,203,361.92
  5. Step 5: Solve for x
    x = 342,226,203,361.92/638,078.40
  6. Step 6: Final answer
    x = 536,338.80

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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.