Home / 672,906.80-1,007,999.40-419,409.20

Finding the Fourth Proportional to 672,906.80, 1,007,999.40 and 419,409.20

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Solution

The fourth proportional to 672,906.80, 1,007,999.40 and 419,409.20 is: 628,265.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,906.80 : 1,007,999.40 = 419,409.20 : x
  2. Step 2: Convert to fraction form
    672,906.80/1,007,999.40 = 419,409.20/x
  3. Step 3: Cross multiply
    672,906.80x = 1,007,999.40 × 419,409.20
  4. Step 4: Simplify right side
    672,906.80x = 422,764,221,954.48
  5. Step 5: Solve for x
    x = 422,764,221,954.48/672,906.80
  6. Step 6: Final answer
    x = 628,265.64

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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.