Home / 769,978.70-1,062,542.75-421,107.18

Finding the Fourth Proportional to 769,978.70, 1,062,542.75 and 421,107.18

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Solution

The fourth proportional to 769,978.70, 1,062,542.75 and 421,107.18 is: 581,112.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,978.70 : 1,062,542.75 = 421,107.18 : x
  2. Step 2: Convert to fraction form
    769,978.70/1,062,542.75 = 421,107.18/x
  3. Step 3: Cross multiply
    769,978.70x = 1,062,542.75 × 421,107.18
  4. Step 4: Simplify right side
    769,978.70x = 447,444,381,081.95
  5. Step 5: Solve for x
    x = 447,444,381,081.95/769,978.70
  6. Step 6: Final answer
    x = 581,112.67

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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.