Home / 1,991,619.68-2,987,431.32-853,643.40

Finding the Fourth Proportional to 1,991,619.68, 2,987,431.32 and 853,643.40

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Solution

The fourth proportional to 1,991,619.68, 2,987,431.32 and 853,643.40 is: 1,280,465.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991,619.68 : 2,987,431.32 = 853,643.40 : x
  2. Step 2: Convert to fraction form
    1,991,619.68/2,987,431.32 = 853,643.40/x
  3. Step 3: Cross multiply
    1,991,619.68x = 2,987,431.32 × 853,643.40
  4. Step 4: Simplify right side
    1,991,619.68x = 2,550,201,029,271.29
  5. Step 5: Solve for x
    x = 2,550,201,029,271.29/1,991,619.68
  6. Step 6: Final answer
    x = 1,280,465.87

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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.