Home / 1,318,861.43-1,978,270.55-420,291.17

Finding the Fourth Proportional to 1,318,861.43, 1,978,270.55 and 420,291.17

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Solution

The fourth proportional to 1,318,861.43, 1,978,270.55 and 420,291.17 is: 630,429.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,861.43 : 1,978,270.55 = 420,291.17 : x
  2. Step 2: Convert to fraction form
    1,318,861.43/1,978,270.55 = 420,291.17/x
  3. Step 3: Cross multiply
    1,318,861.43x = 1,978,270.55 × 420,291.17
  4. Step 4: Simplify right side
    1,318,861.43x = 831,449,641,934.59
  5. Step 5: Solve for x
    x = 831,449,641,934.59/1,318,861.43
  6. Step 6: Final answer
    x = 630,429.87

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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.