Home / 786,738,743.40-1,180,821,951.90-398,831,428.20

Finding the Fourth Proportional to 786,738,743.40, 1,180,821,951.90 and 398,831,428.20

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Solution

The fourth proportional to 786,738,743.40, 1,180,821,951.90 and 398,831,428.20 is: 598,609,016.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,738,743.40 : 1,180,821,951.90 = 398,831,428.20 : x
  2. Step 2: Convert to fraction form
    786,738,743.40/1,180,821,951.90 = 398,831,428.20/x
  3. Step 3: Cross multiply
    786,738,743.40x = 1,180,821,951.90 × 398,831,428.20
  4. Step 4: Simplify right side
    786,738,743.40x = 470,948,905,526,188,736
  5. Step 5: Solve for x
    x = 470,948,905,526,188,736/786,738,743.40
  6. Step 6: Final answer
    x = 598,609,016.62

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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.