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Finding the Fourth Proportional to 1,317,622, 1,976,433 and 419,065.60

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Solution

The fourth proportional to 1,317,622, 1,976,433 and 419,065.60 is: 628,598.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317,622 : 1,976,433 = 419,065.60 : x
  2. Step 2: Convert to fraction form
    1,317,622/1,976,433 = 419,065.60/x
  3. Step 3: Cross multiply
    1,317,622x = 1,976,433 × 419,065.60
  4. Step 4: Simplify right side
    1,317,622x = 828,255,081,004.80
  5. Step 5: Solve for x
    x = 828,255,081,004.80/1,317,622
  6. Step 6: Final answer
    x = 628,598.40

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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.