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Finding the Fourth Proportional to 338,138.20, 506,841.18 and 219,894.40

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Solution

The fourth proportional to 338,138.20, 506,841.18 and 219,894.40 is: 329,603.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,138.20 : 506,841.18 = 219,894.40 : x
  2. Step 2: Convert to fraction form
    338,138.20/506,841.18 = 219,894.40/x
  3. Step 3: Cross multiply
    338,138.20x = 506,841.18 × 219,894.40
  4. Step 4: Simplify right side
    338,138.20x = 111,451,537,171.39
  5. Step 5: Solve for x
    x = 111,451,537,171.39/338,138.20
  6. Step 6: Final answer
    x = 329,603.51

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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.