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Finding the Fourth Proportional to 680,556.98, 939,222.87 and 394,082.12

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Solution

The fourth proportional to 680,556.98, 939,222.87 and 394,082.12 is: 543,864.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,556.98 : 939,222.87 = 394,082.12 : x
  2. Step 2: Convert to fraction form
    680,556.98/939,222.87 = 394,082.12/x
  3. Step 3: Cross multiply
    680,556.98x = 939,222.87 × 394,082.12
  4. Step 4: Simplify right side
    680,556.98x = 370,130,939,762.08
  5. Step 5: Solve for x
    x = 370,130,939,762.08/680,556.98
  6. Step 6: Final answer
    x = 543,864.73

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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.