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Finding the Fourth Proportional to 270,639.40, 405,959.10 and 262,863.40

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Solution

The fourth proportional to 270,639.40, 405,959.10 and 262,863.40 is: 394,295.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,639.40 : 405,959.10 = 262,863.40 : x
  2. Step 2: Convert to fraction form
    270,639.40/405,959.10 = 262,863.40/x
  3. Step 3: Cross multiply
    270,639.40x = 405,959.10 × 262,863.40
  4. Step 4: Simplify right side
    270,639.40x = 106,711,789,286.94
  5. Step 5: Solve for x
    x = 106,711,789,286.94/270,639.40
  6. Step 6: Final answer
    x = 394,295.10

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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.