Home / 990,865.44-1,485,917.87-421,885.80

Finding the Fourth Proportional to 990,865.44, 1,485,917.87 and 421,885.80

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Solution

The fourth proportional to 990,865.44, 1,485,917.87 and 421,885.80 is: 632,666.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,865.44 : 1,485,917.87 = 421,885.80 : x
  2. Step 2: Convert to fraction form
    990,865.44/1,485,917.87 = 421,885.80/x
  3. Step 3: Cross multiply
    990,865.44x = 1,485,917.87 × 421,885.80
  4. Step 4: Simplify right side
    990,865.44x = 626,887,647,209.82
  5. Step 5: Solve for x
    x = 626,887,647,209.82/990,865.44
  6. Step 6: Final answer
    x = 632,666.78

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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.