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Finding the Fourth Proportional to 670,765.80, 925,788.24 and 384,477.60

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Solution

The fourth proportional to 670,765.80, 925,788.24 and 384,477.60 is: 530,654.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,765.80 : 925,788.24 = 384,477.60 : x
  2. Step 2: Convert to fraction form
    670,765.80/925,788.24 = 384,477.60/x
  3. Step 3: Cross multiply
    670,765.80x = 925,788.24 × 384,477.60
  4. Step 4: Simplify right side
    670,765.80x = 355,944,840,623.42
  5. Step 5: Solve for x
    x = 355,944,840,623.42/670,765.80
  6. Step 6: Final answer
    x = 530,654.43

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.