Home / 831,749.21-1,247,087.28-326,361.25

Finding the Fourth Proportional to 831,749.21, 1,247,087.28 and 326,361.25

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Solution

The fourth proportional to 831,749.21, 1,247,087.28 and 326,361.25 is: 489,331.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,749.21 : 1,247,087.28 = 326,361.25 : x
  2. Step 2: Convert to fraction form
    831,749.21/1,247,087.28 = 326,361.25/x
  3. Step 3: Cross multiply
    831,749.21x = 1,247,087.28 × 326,361.25
  4. Step 4: Simplify right side
    831,749.21x = 407,000,959,218.33
  5. Step 5: Solve for x
    x = 407,000,959,218.33/831,749.21
  6. Step 6: Final answer
    x = 489,331.34

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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.