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Finding the Fourth Proportional to 481,211.50, 664,246.92 and 280,007.50

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Solution

The fourth proportional to 481,211.50, 664,246.92 and 280,007.50 is: 386,512.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,211.50 : 664,246.92 = 280,007.50 : x
  2. Step 2: Convert to fraction form
    481,211.50/664,246.92 = 280,007.50/x
  3. Step 3: Cross multiply
    481,211.50x = 664,246.92 × 280,007.50
  4. Step 4: Simplify right side
    481,211.50x = 185,994,119,451.90
  5. Step 5: Solve for x
    x = 185,994,119,451.90/481,211.50
  6. Step 6: Final answer
    x = 386,512.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.