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Finding the Fourth Proportional to 262,886.40, 394,387.20 and 85,363.20

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Solution

The fourth proportional to 262,886.40, 394,387.20 and 85,363.20 is: 128,063.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,886.40 : 394,387.20 = 85,363.20 : x
  2. Step 2: Convert to fraction form
    262,886.40/394,387.20 = 85,363.20/x
  3. Step 3: Cross multiply
    262,886.40x = 394,387.20 × 85,363.20
  4. Step 4: Simplify right side
    262,886.40x = 33,666,153,431.04
  5. Step 5: Solve for x
    x = 33,666,153,431.04/262,886.40
  6. Step 6: Final answer
    x = 128,063.50

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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.