Home / 1,318,771.20-1,978,480.80-372,129.60

Finding the Fourth Proportional to 1,318,771.20, 1,978,480.80 and 372,129.60

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Solution

The fourth proportional to 1,318,771.20, 1,978,480.80 and 372,129.60 is: 558,285.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,771.20 : 1,978,480.80 = 372,129.60 : x
  2. Step 2: Convert to fraction form
    1,318,771.20/1,978,480.80 = 372,129.60/x
  3. Step 3: Cross multiply
    1,318,771.20x = 1,978,480.80 × 372,129.60
  4. Step 4: Simplify right side
    1,318,771.20x = 736,251,268,711.68
  5. Step 5: Solve for x
    x = 736,251,268,711.68/1,318,771.20
  6. Step 6: Final answer
    x = 558,285.83

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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.