Home / 1,443,138.30-1,991,741.10-831,171.96

Finding the Fourth Proportional to 1,443,138.30, 1,991,741.10 and 831,171.96

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Solution

The fourth proportional to 1,443,138.30, 1,991,741.10 and 831,171.96 is: 1,147,138.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,443,138.30 : 1,991,741.10 = 831,171.96 : x
  2. Step 2: Convert to fraction form
    1,443,138.30/1,991,741.10 = 831,171.96/x
  3. Step 3: Cross multiply
    1,443,138.30x = 1,991,741.10 × 831,171.96
  4. Step 4: Simplify right side
    1,443,138.30x = 1,655,479,353,899.56
  5. Step 5: Solve for x
    x = 1,655,479,353,899.56/1,443,138.30
  6. Step 6: Final answer
    x = 1,147,138.40

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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.