Home / 1,391,150.40-2,087,114.40-681,201.60

Finding the Fourth Proportional to 1,391,150.40, 2,087,114.40 and 681,201.60

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Solution

The fourth proportional to 1,391,150.40, 2,087,114.40 and 681,201.60 is: 1,021,992.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,150.40 : 2,087,114.40 = 681,201.60 : x
  2. Step 2: Convert to fraction form
    1,391,150.40/2,087,114.40 = 681,201.60/x
  3. Step 3: Cross multiply
    1,391,150.40x = 2,087,114.40 × 681,201.60
  4. Step 4: Simplify right side
    1,391,150.40x = 1,421,745,668,663.04
  5. Step 5: Solve for x
    x = 1,421,745,668,663.04/1,391,150.40
  6. Step 6: Final answer
    x = 1,021,992.78

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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.