Home / 1,290,628.35-1,780,993.95-717,656.22

Finding the Fourth Proportional to 1,290,628.35, 1,780,993.95 and 717,656.22

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Solution

The fourth proportional to 1,290,628.35, 1,780,993.95 and 717,656.22 is: 990,324.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,628.35 : 1,780,993.95 = 717,656.22 : x
  2. Step 2: Convert to fraction form
    1,290,628.35/1,780,993.95 = 717,656.22/x
  3. Step 3: Cross multiply
    1,290,628.35x = 1,780,993.95 × 717,656.22
  4. Step 4: Simplify right side
    1,290,628.35x = 1,278,141,385,999.87
  5. Step 5: Solve for x
    x = 1,278,141,385,999.87/1,290,628.35
  6. Step 6: Final answer
    x = 990,324.90

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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.