Home / 1,389,290,021.60-2,082,021,844.80-921,621,941.60

Finding the Fourth Proportional to 1,389,290,021.60, 2,082,021,844.80 and 921,621,941.60

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Solution

The fourth proportional to 1,389,290,021.60, 2,082,021,844.80 and 921,621,941.60 is: 1,381,163,749.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,290,021.60 : 2,082,021,844.80 = 921,621,941.60 : x
  2. Step 2: Convert to fraction form
    1,389,290,021.60/2,082,021,844.80 = 921,621,941.60/x
  3. Step 3: Cross multiply
    1,389,290,021.60x = 2,082,021,844.80 × 921,621,941.60
  4. Step 4: Simplify right side
    1,389,290,021.60x = 1,918,837,015,058,189,824
  5. Step 5: Solve for x
    x = 1,918,837,015,058,189,824/1,389,290,021.60
  6. Step 6: Final answer
    x = 1,381,163,749.27

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1.5x scale

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.