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Finding the Fourth Proportional to 280,890.90, 394,076.70 and 280,890.90

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Solution

The fourth proportional to 280,890.90, 394,076.70 and 280,890.90 is: 394,076.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,890.90 : 394,076.70 = 280,890.90 : x
  2. Step 2: Convert to fraction form
    280,890.90/394,076.70 = 280,890.90/x
  3. Step 3: Cross multiply
    280,890.90x = 394,076.70 × 280,890.90
  4. Step 4: Simplify right side
    280,890.90x = 110,692,558,932.03
  5. Step 5: Solve for x
    x = 110,692,558,932.03/280,890.90
  6. Step 6: Final answer
    x = 394,076.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.