Home / 279,972.30-419,630.40-209,769.60

Finding the Fourth Proportional to 279,972.30, 419,630.40 and 209,769.60

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Solution

The fourth proportional to 279,972.30, 419,630.40 and 209,769.60 is: 314,408.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,972.30 : 419,630.40 = 209,769.60 : x
  2. Step 2: Convert to fraction form
    279,972.30/419,630.40 = 209,769.60/x
  3. Step 3: Cross multiply
    279,972.30x = 419,630.40 × 209,769.60
  4. Step 4: Simplify right side
    279,972.30x = 88,025,701,155.84
  5. Step 5: Solve for x
    x = 88,025,701,155.84/279,972.30
  6. Step 6: Final answer
    x = 314,408.61

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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.