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Finding the Fourth Proportional to 262,663.40, 394,043.70 and 85,176.20

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Solution

The fourth proportional to 262,663.40, 394,043.70 and 85,176.20 is: 127,780.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,663.40 : 394,043.70 = 85,176.20 : x
  2. Step 2: Convert to fraction form
    262,663.40/394,043.70 = 85,176.20/x
  3. Step 3: Cross multiply
    262,663.40x = 394,043.70 × 85,176.20
  4. Step 4: Simplify right side
    262,663.40x = 33,563,144,999.94
  5. Step 5: Solve for x
    x = 33,563,144,999.94/262,663.40
  6. Step 6: Final answer
    x = 127,780.06

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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.