Home / 1,290,378.60-1,935,961.56-659,735.28

Finding the Fourth Proportional to 1,290,378.60, 1,935,961.56 and 659,735.28

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Solution

The fourth proportional to 1,290,378.60, 1,935,961.56 and 659,735.28 is: 989,804.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,378.60 : 1,935,961.56 = 659,735.28 : x
  2. Step 2: Convert to fraction form
    1,290,378.60/1,935,961.56 = 659,735.28/x
  3. Step 3: Cross multiply
    1,290,378.60x = 1,935,961.56 × 659,735.28
  4. Step 4: Simplify right side
    1,290,378.60x = 1,277,222,141,855.84
  5. Step 5: Solve for x
    x = 1,277,222,141,855.84/1,290,378.60
  6. Step 6: Final answer
    x = 989,804.19

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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.