Home / 3,990,848-5,507,491.20-2,180,128.64

Finding the Fourth Proportional to 3,990,848, 5,507,491.20 and 2,180,128.64

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Solution

The fourth proportional to 3,990,848, 5,507,491.20 and 2,180,128.64 is: 3,008,643.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990,848 : 5,507,491.20 = 2,180,128.64 : x
  2. Step 2: Convert to fraction form
    3,990,848/5,507,491.20 = 2,180,128.64/x
  3. Step 3: Cross multiply
    3,990,848x = 5,507,491.20 × 2,180,128.64
  4. Step 4: Simplify right side
    3,990,848x = 12,007,039,299,667.97
  5. Step 5: Solve for x
    x = 12,007,039,299,667.97/3,990,848
  6. Step 6: Final answer
    x = 3,008,643.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.