Home / 1,438,280.40-2,158,198.20-639,685.20

Finding the Fourth Proportional to 1,438,280.40, 2,158,198.20 and 639,685.20

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Solution

The fourth proportional to 1,438,280.40, 2,158,198.20 and 639,685.20 is: 959,873.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438,280.40 : 2,158,198.20 = 639,685.20 : x
  2. Step 2: Convert to fraction form
    1,438,280.40/2,158,198.20 = 639,685.20/x
  3. Step 3: Cross multiply
    1,438,280.40x = 2,158,198.20 × 639,685.20
  4. Step 4: Simplify right side
    1,438,280.40x = 1,380,567,447,206.64
  5. Step 5: Solve for x
    x = 1,380,567,447,206.64/1,438,280.40
  6. Step 6: Final answer
    x = 959,873.64

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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.