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Finding the Fourth Proportional to 522,069.40, 783,104.10 and 389,209.15

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Solution

The fourth proportional to 522,069.40, 783,104.10 and 389,209.15 is: 583,813.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,069.40 : 783,104.10 = 389,209.15 : x
  2. Step 2: Convert to fraction form
    522,069.40/783,104.10 = 389,209.15/x
  3. Step 3: Cross multiply
    522,069.40x = 783,104.10 × 389,209.15
  4. Step 4: Simplify right side
    522,069.40x = 304,791,281,122.52
  5. Step 5: Solve for x
    x = 304,791,281,122.52/522,069.40
  6. Step 6: Final answer
    x = 583,813.73

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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.