Home / 990,661.32-1,485,976.05-391,628.07

Finding the Fourth Proportional to 990,661.32, 1,485,976.05 and 391,628.07

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Solution

The fourth proportional to 990,661.32, 1,485,976.05 and 391,628.07 is: 587,435.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,661.32 : 1,485,976.05 = 391,628.07 : x
  2. Step 2: Convert to fraction form
    990,661.32/1,485,976.05 = 391,628.07/x
  3. Step 3: Cross multiply
    990,661.32x = 1,485,976.05 × 391,628.07
  4. Step 4: Simplify right side
    990,661.32x = 581,949,932,527.72
  5. Step 5: Solve for x
    x = 581,949,932,527.72/990,661.32
  6. Step 6: Final answer
    x = 587,435.81

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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.