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Finding the Fourth Proportional to 285,799.89, 394,411.78 and 156,744.34

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Solution

The fourth proportional to 285,799.89, 394,411.78 and 156,744.34 is: 216,311.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,799.89 : 394,411.78 = 156,744.34 : x
  2. Step 2: Convert to fraction form
    285,799.89/394,411.78 = 156,744.34/x
  3. Step 3: Cross multiply
    285,799.89x = 394,411.78 × 156,744.34
  4. Step 4: Simplify right side
    285,799.89x = 61,821,814,463.51
  5. Step 5: Solve for x
    x = 61,821,814,463.51/285,799.89
  6. Step 6: Final answer
    x = 216,311.54

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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.