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Finding the Fourth Proportional to 659,606.40, 989,409.60 and 327,830.40

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Solution

The fourth proportional to 659,606.40, 989,409.60 and 327,830.40 is: 491,745.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,606.40 : 989,409.60 = 327,830.40 : x
  2. Step 2: Convert to fraction form
    659,606.40/989,409.60 = 327,830.40/x
  3. Step 3: Cross multiply
    659,606.40x = 989,409.60 × 327,830.40
  4. Step 4: Simplify right side
    659,606.40x = 324,358,544,931.84
  5. Step 5: Solve for x
    x = 324,358,544,931.84/659,606.40
  6. Step 6: Final answer
    x = 491,745.60

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Half scale
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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.