Home / 1,990,405.40-2,980,921.07-1,314,811.02

Finding the Fourth Proportional to 1,990,405.40, 2,980,921.07 and 1,314,811.02

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Solution

The fourth proportional to 1,990,405.40, 2,980,921.07 and 1,314,811.02 is: 1,969,120.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,405.40 : 2,980,921.07 = 1,314,811.02 : x
  2. Step 2: Convert to fraction form
    1,990,405.40/2,980,921.07 = 1,314,811.02/x
  3. Step 3: Cross multiply
    1,990,405.40x = 2,980,921.07 × 1,314,811.02
  4. Step 4: Simplify right side
    1,990,405.40x = 3,919,347,866,012.14
  5. Step 5: Solve for x
    x = 3,919,347,866,012.14/1,990,405.40
  6. Step 6: Final answer
    x = 1,969,120.40

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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.