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Finding the Fourth Proportional to 403,480.40, 603,665.40 and 263,512.40

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Solution

The fourth proportional to 403,480.40, 603,665.40 and 263,512.40 is: 394,252.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,480.40 : 603,665.40 = 263,512.40 : x
  2. Step 2: Convert to fraction form
    403,480.40/603,665.40 = 263,512.40/x
  3. Step 3: Cross multiply
    403,480.40x = 603,665.40 × 263,512.40
  4. Step 4: Simplify right side
    403,480.40x = 159,073,318,350.96
  5. Step 5: Solve for x
    x = 159,073,318,350.96/403,480.40
  6. Step 6: Final answer
    x = 394,252.90

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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.