Home / 1,380,558.99-2,071,152.20-421,100.43

Finding the Fourth Proportional to 1,380,558.99, 2,071,152.20 and 421,100.43

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Solution

The fourth proportional to 1,380,558.99, 2,071,152.20 and 421,100.43 is: 631,746.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,558.99 : 2,071,152.20 = 421,100.43 : x
  2. Step 2: Convert to fraction form
    1,380,558.99/2,071,152.20 = 421,100.43/x
  3. Step 3: Cross multiply
    1,380,558.99x = 2,071,152.20 × 421,100.43
  4. Step 4: Simplify right side
    1,380,558.99x = 872,163,082,015.45
  5. Step 5: Solve for x
    x = 872,163,082,015.45/1,380,558.99
  6. Step 6: Final answer
    x = 631,746.33

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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.