Home / 1,318,789.56-1,978,162.70-420,219.14

Finding the Fourth Proportional to 1,318,789.56, 1,978,162.70 and 420,219.14

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Solution

The fourth proportional to 1,318,789.56, 1,978,162.70 and 420,219.14 is: 630,321.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,789.56 : 1,978,162.70 = 420,219.14 : x
  2. Step 2: Convert to fraction form
    1,318,789.56/1,978,162.70 = 420,219.14/x
  3. Step 3: Cross multiply
    1,318,789.56x = 1,978,162.70 × 420,219.14
  4. Step 4: Simplify right side
    1,318,789.56x = 831,261,819,733.81
  5. Step 5: Solve for x
    x = 831,261,819,733.81/1,318,789.56
  6. Step 6: Final answer
    x = 630,321.81

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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.