Home / 1,078,840.80-1,620,010.80-725,421.60

Finding the Fourth Proportional to 1,078,840.80, 1,620,010.80 and 725,421.60

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Solution

The fourth proportional to 1,078,840.80, 1,620,010.80 and 725,421.60 is: 1,089,308.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078,840.80 : 1,620,010.80 = 725,421.60 : x
  2. Step 2: Convert to fraction form
    1,078,840.80/1,620,010.80 = 725,421.60/x
  3. Step 3: Cross multiply
    1,078,840.80x = 1,620,010.80 × 725,421.60
  4. Step 4: Simplify right side
    1,078,840.80x = 1,175,190,826,553.28
  5. Step 5: Solve for x
    x = 1,175,190,826,553.28/1,078,840.80
  6. Step 6: Final answer
    x = 1,089,308.85

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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.