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Finding the Fourth Proportional to 1,392,840, 2,089,850.49 and 761,015.70

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Solution

The fourth proportional to 1,392,840, 2,089,850.49 and 761,015.70 is: 1,141,846.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,840 : 2,089,850.49 = 761,015.70 : x
  2. Step 2: Convert to fraction form
    1,392,840/2,089,850.49 = 761,015.70/x
  3. Step 3: Cross multiply
    1,392,840x = 2,089,850.49 × 761,015.70
  4. Step 4: Simplify right side
    1,392,840x = 1,590,409,033,542.69
  5. Step 5: Solve for x
    x = 1,590,409,033,542.69/1,392,840
  6. Step 6: Final answer
    x = 1,141,846.18

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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.