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Finding the Fourth Proportional to 262,803.40, 394,262.70 and 85,280.20

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Solution

The fourth proportional to 262,803.40, 394,262.70 and 85,280.20 is: 127,938.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,803.40 : 394,262.70 = 85,280.20 : x
  2. Step 2: Convert to fraction form
    262,803.40/394,262.70 = 85,280.20/x
  3. Step 3: Cross multiply
    262,803.40x = 394,262.70 × 85,280.20
  4. Step 4: Simplify right side
    262,803.40x = 33,622,801,908.54
  5. Step 5: Solve for x
    x = 33,622,801,908.54/262,803.40
  6. Step 6: Final answer
    x = 127,938.99

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.