Home / 1,390,163.40-2,082,912.30-678,659.40

Finding the Fourth Proportional to 1,390,163.40, 2,082,912.30 and 678,659.40

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Solution

The fourth proportional to 1,390,163.40, 2,082,912.30 and 678,659.40 is: 1,016,850.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,163.40 : 2,082,912.30 = 678,659.40 : x
  2. Step 2: Convert to fraction form
    1,390,163.40/2,082,912.30 = 678,659.40/x
  3. Step 3: Cross multiply
    1,390,163.40x = 2,082,912.30 × 678,659.40
  4. Step 4: Simplify right side
    1,390,163.40x = 1,413,588,011,770.62
  5. Step 5: Solve for x
    x = 1,413,588,011,770.62/1,390,163.40
  6. Step 6: Final answer
    x = 1,016,850.26

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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.