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Finding the Fourth Proportional to 268,390.40, 403,363.20 and 263,724.80

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Solution

The fourth proportional to 268,390.40, 403,363.20 and 263,724.80 is: 396,351.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,390.40 : 403,363.20 = 263,724.80 : x
  2. Step 2: Convert to fraction form
    268,390.40/403,363.20 = 263,724.80/x
  3. Step 3: Cross multiply
    268,390.40x = 403,363.20 × 263,724.80
  4. Step 4: Simplify right side
    268,390.40x = 106,376,879,247.36
  5. Step 5: Solve for x
    x = 106,376,879,247.36/268,390.40
  6. Step 6: Final answer
    x = 396,351.28

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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.