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Finding the Fourth Proportional to 436,205.80, 653,963.10 and 239,213.80

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Solution

The fourth proportional to 436,205.80, 653,963.10 and 239,213.80 is: 358,631.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,205.80 : 653,963.10 = 239,213.80 : x
  2. Step 2: Convert to fraction form
    436,205.80/653,963.10 = 239,213.80/x
  3. Step 3: Cross multiply
    436,205.80x = 653,963.10 × 239,213.80
  4. Step 4: Simplify right side
    436,205.80x = 156,436,998,210.78
  5. Step 5: Solve for x
    x = 156,436,998,210.78/436,205.80
  6. Step 6: Final answer
    x = 358,631.17

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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.