Home / 990,867-1,367,350.70-561,150.21

Finding the Fourth Proportional to 990,867, 1,367,350.70 and 561,150.21

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Solution

The fourth proportional to 990,867, 1,367,350.70 and 561,150.21 is: 774,361.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,867 : 1,367,350.70 = 561,150.21 : x
  2. Step 2: Convert to fraction form
    990,867/1,367,350.70 = 561,150.21/x
  3. Step 3: Cross multiply
    990,867x = 1,367,350.70 × 561,150.21
  4. Step 4: Simplify right side
    990,867x = 767,289,132,448.65
  5. Step 5: Solve for x
    x = 767,289,132,448.65/990,867
  6. Step 6: Final answer
    x = 774,361.37

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1.5x scale

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.