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Finding the Fourth Proportional to 620,661.60, 930,992.40 and 384,465.60

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Solution

The fourth proportional to 620,661.60, 930,992.40 and 384,465.60 is: 576,698.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,661.60 : 930,992.40 = 384,465.60 : x
  2. Step 2: Convert to fraction form
    620,661.60/930,992.40 = 384,465.60/x
  3. Step 3: Cross multiply
    620,661.60x = 930,992.40 × 384,465.60
  4. Step 4: Simplify right side
    620,661.60x = 357,934,551,661.44
  5. Step 5: Solve for x
    x = 357,934,551,661.44/620,661.60
  6. Step 6: Final answer
    x = 576,698.40

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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.