Home / 1,210,069.80-1,815,104.70-811,938.60

Finding the Fourth Proportional to 1,210,069.80, 1,815,104.70 and 811,938.60

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Solution

The fourth proportional to 1,210,069.80, 1,815,104.70 and 811,938.60 is: 1,217,907.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,069.80 : 1,815,104.70 = 811,938.60 : x
  2. Step 2: Convert to fraction form
    1,210,069.80/1,815,104.70 = 811,938.60/x
  3. Step 3: Cross multiply
    1,210,069.80x = 1,815,104.70 × 811,938.60
  4. Step 4: Simplify right side
    1,210,069.80x = 1,473,753,568,971.42
  5. Step 5: Solve for x
    x = 1,473,753,568,971.42/1,210,069.80
  6. Step 6: Final answer
    x = 1,217,907.90

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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.