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Finding the Fourth Proportional to 522,078.40, 783,117.60 and 389,218.15

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Solution

The fourth proportional to 522,078.40, 783,117.60 and 389,218.15 is: 583,827.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,078.40 : 783,117.60 = 389,218.15 : x
  2. Step 2: Convert to fraction form
    522,078.40/783,117.60 = 389,218.15/x
  3. Step 3: Cross multiply
    522,078.40x = 783,117.60 × 389,218.15
  4. Step 4: Simplify right side
    522,078.40x = 304,803,583,504.44
  5. Step 5: Solve for x
    x = 304,803,583,504.44/522,078.40
  6. Step 6: Final answer
    x = 583,827.23

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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.