Home / 726,143.67-1,001,912.90-420,212.34

Finding the Fourth Proportional to 726,143.67, 1,001,912.90 and 420,212.34

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Solution

The fourth proportional to 726,143.67, 1,001,912.90 and 420,212.34 is: 579,797.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    726,143.67 : 1,001,912.90 = 420,212.34 : x
  2. Step 2: Convert to fraction form
    726,143.67/1,001,912.90 = 420,212.34/x
  3. Step 3: Cross multiply
    726,143.67x = 1,001,912.90 × 420,212.34
  4. Step 4: Simplify right side
    726,143.67x = 421,016,162,084.12
  5. Step 5: Solve for x
    x = 421,016,162,084.12/726,143.67
  6. Step 6: Final answer
    x = 579,797.33

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1.5x scale

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.