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Finding the Fourth Proportional to 279,996.40, 419,994.60 and 210,012.40

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Solution

The fourth proportional to 279,996.40, 419,994.60 and 210,012.40 is: 315,018.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,996.40 : 419,994.60 = 210,012.40 : x
  2. Step 2: Convert to fraction form
    279,996.40/419,994.60 = 210,012.40/x
  3. Step 3: Cross multiply
    279,996.40x = 419,994.60 × 210,012.40
  4. Step 4: Simplify right side
    279,996.40x = 88,204,073,933.04
  5. Step 5: Solve for x
    x = 88,204,073,933.04/279,996.40
  6. Step 6: Final answer
    x = 315,018.60

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1.5x scale

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.