Home / 843,518,390.78-1,265,361,136.32-311,869,211.48

Finding the Fourth Proportional to 843,518,390.78, 1,265,361,136.32 and 311,869,211.48

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Solution

The fourth proportional to 843,518,390.78, 1,265,361,136.32 and 311,869,211.48 is: 467,834,707.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    843,518,390.78 : 1,265,361,136.32 = 311,869,211.48 : x
  2. Step 2: Convert to fraction form
    843,518,390.78/1,265,361,136.32 = 311,869,211.48/x
  3. Step 3: Cross multiply
    843,518,390.78x = 1,265,361,136.32 × 311,869,211.48
  4. Step 4: Simplify right side
    843,518,390.78x = 394,627,179,818,819,520
  5. Step 5: Solve for x
    x = 394,627,179,818,819,520/843,518,390.78
  6. Step 6: Final answer
    x = 467,834,707.74

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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.