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Finding the Fourth Proportional to 263,271.30, 394,906.95 and 105,612.90

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Solution

The fourth proportional to 263,271.30, 394,906.95 and 105,612.90 is: 158,419.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,271.30 : 394,906.95 = 105,612.90 : x
  2. Step 2: Convert to fraction form
    263,271.30/394,906.95 = 105,612.90/x
  3. Step 3: Cross multiply
    263,271.30x = 394,906.95 × 105,612.90
  4. Step 4: Simplify right side
    263,271.30x = 41,707,268,219.66
  5. Step 5: Solve for x
    x = 41,707,268,219.66/263,271.30
  6. Step 6: Final answer
    x = 158,419.35

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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.