Home / 1,318,790.57-1,978,164.05-420,220.10

Finding the Fourth Proportional to 1,318,790.57, 1,978,164.05 and 420,220.10

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Solution

The fourth proportional to 1,318,790.57, 1,978,164.05 and 420,220.10 is: 630,323.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,790.57 : 1,978,164.05 = 420,220.10 : x
  2. Step 2: Convert to fraction form
    1,318,790.57/1,978,164.05 = 420,220.10/x
  3. Step 3: Cross multiply
    1,318,790.57x = 1,978,164.05 × 420,220.10
  4. Step 4: Simplify right side
    1,318,790.57x = 831,264,297,751.72
  5. Step 5: Solve for x
    x = 831,264,297,751.72/1,318,790.57
  6. Step 6: Final answer
    x = 630,323.21

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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.