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Finding the Fourth Proportional to 381,039.86, 571,443.06 and 263,466.74

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Solution

The fourth proportional to 381,039.86, 571,443.06 and 263,466.74 is: 395,119.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,039.86 : 571,443.06 = 263,466.74 : x
  2. Step 2: Convert to fraction form
    381,039.86/571,443.06 = 263,466.74/x
  3. Step 3: Cross multiply
    381,039.86x = 571,443.06 × 263,466.74
  4. Step 4: Simplify right side
    381,039.86x = 150,556,240,113.82
  5. Step 5: Solve for x
    x = 150,556,240,113.82/381,039.86
  6. Step 6: Final answer
    x = 395,119.40

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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.