Home / 1,290,028.62-1,780,260.75-709,276.26

Finding the Fourth Proportional to 1,290,028.62, 1,780,260.75 and 709,276.26

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Solution

The fourth proportional to 1,290,028.62, 1,780,260.75 and 709,276.26 is: 978,812.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,028.62 : 1,780,260.75 = 709,276.26 : x
  2. Step 2: Convert to fraction form
    1,290,028.62/1,780,260.75 = 709,276.26/x
  3. Step 3: Cross multiply
    1,290,028.62x = 1,780,260.75 × 709,276.26
  4. Step 4: Simplify right side
    1,290,028.62x = 1,262,696,686,584.80
  5. Step 5: Solve for x
    x = 1,262,696,686,584.80/1,290,028.62
  6. Step 6: Final answer
    x = 978,812.92

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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.