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Finding the Fourth Proportional to 1,986,069.93, 2,978,661.55 and 920,973.60

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Solution

The fourth proportional to 1,986,069.93, 2,978,661.55 and 920,973.60 is: 1,381,254.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986,069.93 : 2,978,661.55 = 920,973.60 : x
  2. Step 2: Convert to fraction form
    1,986,069.93/2,978,661.55 = 920,973.60/x
  3. Step 3: Cross multiply
    1,986,069.93x = 2,978,661.55 × 920,973.60
  4. Step 4: Simplify right side
    1,986,069.93x = 2,743,268,650,885.08
  5. Step 5: Solve for x
    x = 2,743,268,650,885.08/1,986,069.93
  6. Step 6: Final answer
    x = 1,381,254.81

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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.