Home / 1,290,628.28-1,780,993.88-717,656.16

Finding the Fourth Proportional to 1,290,628.28, 1,780,993.88 and 717,656.16

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Solution

The fourth proportional to 1,290,628.28, 1,780,993.88 and 717,656.16 is: 990,324.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,628.28 : 1,780,993.88 = 717,656.16 : x
  2. Step 2: Convert to fraction form
    1,290,628.28/1,780,993.88 = 717,656.16/x
  3. Step 3: Cross multiply
    1,290,628.28x = 1,780,993.88 × 717,656.16
  4. Step 4: Simplify right side
    1,290,628.28x = 1,278,141,228,904.30
  5. Step 5: Solve for x
    x = 1,278,141,228,904.30/1,290,628.28
  6. Step 6: Final answer
    x = 990,324.83

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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.