Home / 1,318,902.90-1,978,317.27-420,398.52

Finding the Fourth Proportional to 1,318,902.90, 1,978,317.27 and 420,398.52

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Solution

The fourth proportional to 1,318,902.90, 1,978,317.27 and 420,398.52 is: 630,585.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,902.90 : 1,978,317.27 = 420,398.52 : x
  2. Step 2: Convert to fraction form
    1,318,902.90/1,978,317.27 = 420,398.52/x
  3. Step 3: Cross multiply
    1,318,902.90x = 1,978,317.27 × 420,398.52
  4. Step 4: Simplify right side
    1,318,902.90x = 831,681,652,398.44
  5. Step 5: Solve for x
    x = 831,681,652,398.44/1,318,902.90
  6. Step 6: Final answer
    x = 630,585.96

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.