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Finding the Fourth Proportional to 262,690.40, 394,327.20 and 203,787.20

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Solution

The fourth proportional to 262,690.40, 394,327.20 and 203,787.20 is: 305,907.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,690.40 : 394,327.20 = 203,787.20 : x
  2. Step 2: Convert to fraction form
    262,690.40/394,327.20 = 203,787.20/x
  3. Step 3: Cross multiply
    262,690.40x = 394,327.20 × 203,787.20
  4. Step 4: Simplify right side
    262,690.40x = 80,358,835,971.84
  5. Step 5: Solve for x
    x = 80,358,835,971.84/262,690.40
  6. Step 6: Final answer
    x = 305,907.01

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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.