Home / 1,991,096.76-2,986,390.92-643,119.32

Finding the Fourth Proportional to 1,991,096.76, 2,986,390.92 and 643,119.32

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Solution

The fourth proportional to 1,991,096.76, 2,986,390.92 and 643,119.32 is: 964,596.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991,096.76 : 2,986,390.92 = 643,119.32 : x
  2. Step 2: Convert to fraction form
    1,991,096.76/2,986,390.92 = 643,119.32/x
  3. Step 3: Cross multiply
    1,991,096.76x = 2,986,390.92 × 643,119.32
  4. Step 4: Simplify right side
    1,991,096.76x = 1,920,605,697,724.57
  5. Step 5: Solve for x
    x = 1,920,605,697,724.57/1,991,096.76
  6. Step 6: Final answer
    x = 964,596.87

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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.