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Finding the Fourth Proportional to 831,419, 1,147,359.90 and 449,445.74

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Solution

The fourth proportional to 831,419, 1,147,359.90 and 449,445.74 is: 620,236.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,419 : 1,147,359.90 = 449,445.74 : x
  2. Step 2: Convert to fraction form
    831,419/1,147,359.90 = 449,445.74/x
  3. Step 3: Cross multiply
    831,419x = 1,147,359.90 × 449,445.74
  4. Step 4: Simplify right side
    831,419x = 515,676,019,301.83
  5. Step 5: Solve for x
    x = 515,676,019,301.83/831,419
  6. Step 6: Final answer
    x = 620,236.03

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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.