Home / 831,361.79-1,147,279.61-449,388.57

Finding the Fourth Proportional to 831,361.79, 1,147,279.61 and 449,388.57

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Solution

The fourth proportional to 831,361.79, 1,147,279.61 and 449,388.57 is: 620,156.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,361.79 : 1,147,279.61 = 449,388.57 : x
  2. Step 2: Convert to fraction form
    831,361.79/1,147,279.61 = 449,388.57/x
  3. Step 3: Cross multiply
    831,361.79x = 1,147,279.61 × 449,388.57
  4. Step 4: Simplify right side
    831,361.79x = 515,574,348,753.83
  5. Step 5: Solve for x
    x = 515,574,348,753.83/831,361.79
  6. Step 6: Final answer
    x = 620,156.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.