Home / 920,770.74-1,270,859.70-618,789.78

Finding the Fourth Proportional to 920,770.74, 1,270,859.70 and 618,789.78

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Solution

The fourth proportional to 920,770.74, 1,270,859.70 and 618,789.78 is: 854,061.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,770.74 : 1,270,859.70 = 618,789.78 : x
  2. Step 2: Convert to fraction form
    920,770.74/1,270,859.70 = 618,789.78/x
  3. Step 3: Cross multiply
    920,770.74x = 1,270,859.70 × 618,789.78
  4. Step 4: Simplify right side
    920,770.74x = 786,394,994,173.87
  5. Step 5: Solve for x
    x = 786,394,994,173.87/920,770.74
  6. Step 6: Final answer
    x = 854,061.67

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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.