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Finding the Fourth Proportional to 336,122.20, 470,921 and 336,122.20

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Solution

The fourth proportional to 336,122.20, 470,921 and 336,122.20 is: 470,921

Step by Step Solution

  1. Step 1: Write the proportion equation
    336,122.20 : 470,921 = 336,122.20 : x
  2. Step 2: Convert to fraction form
    336,122.20/470,921 = 336,122.20/x
  3. Step 3: Cross multiply
    336,122.20x = 470,921 × 336,122.20
  4. Step 4: Simplify right side
    336,122.20x = 158,287,002,546.20
  5. Step 5: Solve for x
    x = 158,287,002,546.20/336,122.20
  6. Step 6: Final answer
    x = 470,921

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.