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Finding the Fourth Proportional to 280,257.03, 420,551.55 and 262,524.87

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Solution

The fourth proportional to 280,257.03, 420,551.55 and 262,524.87 is: 393,942.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,257.03 : 420,551.55 = 262,524.87 : x
  2. Step 2: Convert to fraction form
    280,257.03/420,551.55 = 262,524.87/x
  3. Step 3: Cross multiply
    280,257.03x = 420,551.55 × 262,524.87
  4. Step 4: Simplify right side
    280,257.03x = 110,405,240,992.05
  5. Step 5: Solve for x
    x = 110,405,240,992.05/280,257.03
  6. Step 6: Final answer
    x = 393,942.81

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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.