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Finding the Fourth Proportional to 702,759.20, 1,054,215.60 and 680,640.80

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Solution

The fourth proportional to 702,759.20, 1,054,215.60 and 680,640.80 is: 1,021,035.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,759.20 : 1,054,215.60 = 680,640.80 : x
  2. Step 2: Convert to fraction form
    702,759.20/1,054,215.60 = 680,640.80/x
  3. Step 3: Cross multiply
    702,759.20x = 1,054,215.60 × 680,640.80
  4. Step 4: Simplify right side
    702,759.20x = 717,542,149,356.48
  5. Step 5: Solve for x
    x = 717,542,149,356.48/702,759.20
  6. Step 6: Final answer
    x = 1,021,035.58

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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.