Home / 727,081.12-1,003,112.23-420,990.42

Finding the Fourth Proportional to 727,081.12, 1,003,112.23 and 420,990.42

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Solution

The fourth proportional to 727,081.12, 1,003,112.23 and 420,990.42 is: 580,816.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    727,081.12 : 1,003,112.23 = 420,990.42 : x
  2. Step 2: Convert to fraction form
    727,081.12/1,003,112.23 = 420,990.42/x
  3. Step 3: Cross multiply
    727,081.12x = 1,003,112.23 × 420,990.42
  4. Step 4: Simplify right side
    727,081.12x = 422,300,639,014.84
  5. Step 5: Solve for x
    x = 422,300,639,014.84/727,081.12
  6. Step 6: Final answer
    x = 580,816.40

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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.