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Finding the Fourth Proportional to 1,256,922.75, 1,734,250.94 and 740,697.74

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Solution

The fourth proportional to 1,256,922.75, 1,734,250.94 and 740,697.74 is: 1,021,984.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256,922.75 : 1,734,250.94 = 740,697.74 : x
  2. Step 2: Convert to fraction form
    1,256,922.75/1,734,250.94 = 740,697.74/x
  3. Step 3: Cross multiply
    1,256,922.75x = 1,734,250.94 × 740,697.74
  4. Step 4: Simplify right side
    1,256,922.75x = 1,284,555,743,179.62
  5. Step 5: Solve for x
    x = 1,284,555,743,179.62/1,256,922.75
  6. Step 6: Final answer
    x = 1,021,984.64

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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.