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Finding the Fourth Proportional to 579,504.80, 869,257.20 and 439,536.80

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Solution

The fourth proportional to 579,504.80, 869,257.20 and 439,536.80 is: 659,305.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,504.80 : 869,257.20 = 439,536.80 : x
  2. Step 2: Convert to fraction form
    579,504.80/869,257.20 = 439,536.80/x
  3. Step 3: Cross multiply
    579,504.80x = 869,257.20 × 439,536.80
  4. Step 4: Simplify right side
    579,504.80x = 382,070,528,064.96
  5. Step 5: Solve for x
    x = 382,070,528,064.96/579,504.80
  6. Step 6: Final answer
    x = 659,305.20

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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.