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Finding the Fourth Proportional to 341,639.40, 512,920.80 and 199,630.20

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Solution

The fourth proportional to 341,639.40, 512,920.80 and 199,630.20 is: 299,715.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    341,639.40 : 512,920.80 = 199,630.20 : x
  2. Step 2: Convert to fraction form
    341,639.40/512,920.80 = 199,630.20/x
  3. Step 3: Cross multiply
    341,639.40x = 512,920.80 × 199,630.20
  4. Step 4: Simplify right side
    341,639.40x = 102,394,481,888.16
  5. Step 5: Solve for x
    x = 102,394,481,888.16/341,639.40
  6. Step 6: Final answer
    x = 299,715.09

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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.