Home / 1,078,999.60-1,618,499.40-680,090.80

Finding the Fourth Proportional to 1,078,999.60, 1,618,499.40 and 680,090.80

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Solution

The fourth proportional to 1,078,999.60, 1,618,499.40 and 680,090.80 is: 1,020,136.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078,999.60 : 1,618,499.40 = 680,090.80 : x
  2. Step 2: Convert to fraction form
    1,078,999.60/1,618,499.40 = 680,090.80/x
  3. Step 3: Cross multiply
    1,078,999.60x = 1,618,499.40 × 680,090.80
  4. Step 4: Simplify right side
    1,078,999.60x = 1,100,726,551,745.52
  5. Step 5: Solve for x
    x = 1,100,726,551,745.52/1,078,999.60
  6. Step 6: Final answer
    x = 1,020,136.20

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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.