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Finding the Fourth Proportional to 205,483.69, 283,487.39 and 128,958.13

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Solution

The fourth proportional to 205,483.69, 283,487.39 and 128,958.13 is: 177,911.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,483.69 : 283,487.39 = 128,958.13 : x
  2. Step 2: Convert to fraction form
    205,483.69/283,487.39 = 128,958.13/x
  3. Step 3: Cross multiply
    205,483.69x = 283,487.39 × 128,958.13
  4. Step 4: Simplify right side
    205,483.69x = 36,558,002,275.54
  5. Step 5: Solve for x
    x = 36,558,002,275.54/205,483.69
  6. Step 6: Final answer
    x = 177,911.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.