Home / 782,065,890.40-1,174,352,211.60-621,840,200.80

Finding the Fourth Proportional to 782,065,890.40, 1,174,352,211.60 and 621,840,200.80

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Solution

The fourth proportional to 782,065,890.40, 1,174,352,211.60 and 621,840,200.80 is: 933,756,891.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,065,890.40 : 1,174,352,211.60 = 621,840,200.80 : x
  2. Step 2: Convert to fraction form
    782,065,890.40/1,174,352,211.60 = 621,840,200.80/x
  3. Step 3: Cross multiply
    782,065,890.40x = 1,174,352,211.60 × 621,840,200.80
  4. Step 4: Simplify right side
    782,065,890.40x = 730,259,415,071,267,968
  5. Step 5: Solve for x
    x = 730,259,415,071,267,968/782,065,890.40
  6. Step 6: Final answer
    x = 933,756,891.89

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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.