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Finding the Fourth Proportional to 572,234.40, 858,351.60 and 439,783.20

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Solution

The fourth proportional to 572,234.40, 858,351.60 and 439,783.20 is: 659,674.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,234.40 : 858,351.60 = 439,783.20 : x
  2. Step 2: Convert to fraction form
    572,234.40/858,351.60 = 439,783.20/x
  3. Step 3: Cross multiply
    572,234.40x = 858,351.60 × 439,783.20
  4. Step 4: Simplify right side
    572,234.40x = 377,488,613,373.12
  5. Step 5: Solve for x
    x = 377,488,613,373.12/572,234.40
  6. Step 6: Final answer
    x = 659,674.80

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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.