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Finding the Fourth Proportional to 647,139.39, 970,709.08 and 197,860.26

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Solution

The fourth proportional to 647,139.39, 970,709.08 and 197,860.26 is: 296,790.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,139.39 : 970,709.08 = 197,860.26 : x
  2. Step 2: Convert to fraction form
    647,139.39/970,709.08 = 197,860.26/x
  3. Step 3: Cross multiply
    647,139.39x = 970,709.08 × 197,860.26
  4. Step 4: Simplify right side
    647,139.39x = 192,064,749,751.40
  5. Step 5: Solve for x
    x = 192,064,749,751.40/647,139.39
  6. Step 6: Final answer
    x = 296,790.39

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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.