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Finding the Fourth Proportional to 280,161.48, 386,628.98 and 152,836.97

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Solution

The fourth proportional to 280,161.48, 386,628.98 and 152,836.97 is: 210,918.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,161.48 : 386,628.98 = 152,836.97 : x
  2. Step 2: Convert to fraction form
    280,161.48/386,628.98 = 152,836.97/x
  3. Step 3: Cross multiply
    280,161.48x = 386,628.98 × 152,836.97
  4. Step 4: Simplify right side
    280,161.48x = 59,091,201,817.39
  5. Step 5: Solve for x
    x = 59,091,201,817.39/280,161.48
  6. Step 6: Final answer
    x = 210,918.37

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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.