Home / 1,272,887.40-1,756,647.76-789,608.28

Finding the Fourth Proportional to 1,272,887.40, 1,756,647.76 and 789,608.28

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Solution

The fourth proportional to 1,272,887.40, 1,756,647.76 and 789,608.28 is: 1,089,698.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272,887.40 : 1,756,647.76 = 789,608.28 : x
  2. Step 2: Convert to fraction form
    1,272,887.40/1,756,647.76 = 789,608.28/x
  3. Step 3: Cross multiply
    1,272,887.40x = 1,756,647.76 × 789,608.28
  4. Step 4: Simplify right side
    1,272,887.40x = 1,387,063,616,339.45
  5. Step 5: Solve for x
    x = 1,387,063,616,339.45/1,272,887.40
  6. Step 6: Final answer
    x = 1,089,698.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.