Home / 431,158,086.80-646,831,608.60-212,912,982.80

Finding the Fourth Proportional to 431,158,086.80, 646,831,608.60 and 212,912,982.80

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Solution

The fourth proportional to 431,158,086.80, 646,831,608.60 and 212,912,982.80 is: 319,416,129.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,158,086.80 : 646,831,608.60 = 212,912,982.80 : x
  2. Step 2: Convert to fraction form
    431,158,086.80/646,831,608.60 = 212,912,982.80/x
  3. Step 3: Cross multiply
    431,158,086.80x = 646,831,608.60 × 212,912,982.80
  4. Step 4: Simplify right side
    431,158,086.80x = 137,718,847,156,348,144
  5. Step 5: Solve for x
    x = 137,718,847,156,348,144/431,158,086.80
  6. Step 6: Final answer
    x = 319,416,129.19

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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.