Home / 1,318,791.06-1,978,164.95-420,220.64

Finding the Fourth Proportional to 1,318,791.06, 1,978,164.95 and 420,220.64

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Solution

The fourth proportional to 1,318,791.06, 1,978,164.95 and 420,220.64 is: 630,324.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,791.06 : 1,978,164.95 = 420,220.64 : x
  2. Step 2: Convert to fraction form
    1,318,791.06/1,978,164.95 = 420,220.64/x
  3. Step 3: Cross multiply
    1,318,791.06x = 1,978,164.95 × 420,220.64
  4. Step 4: Simplify right side
    1,318,791.06x = 831,265,744,158.88
  5. Step 5: Solve for x
    x = 831,265,744,158.88/1,318,791.06
  6. Step 6: Final answer
    x = 630,324.07

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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.