Home / 1,388,361.76-1,915,924.80-776,507.20

Finding the Fourth Proportional to 1,388,361.76, 1,915,924.80 and 776,507.20

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Solution

The fourth proportional to 1,388,361.76, 1,915,924.80 and 776,507.20 is: 1,071,571.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,361.76 : 1,915,924.80 = 776,507.20 : x
  2. Step 2: Convert to fraction form
    1,388,361.76/1,915,924.80 = 776,507.20/x
  3. Step 3: Cross multiply
    1,388,361.76x = 1,915,924.80 × 776,507.20
  4. Step 4: Simplify right side
    1,388,361.76x = 1,487,729,401,858.56
  5. Step 5: Solve for x
    x = 1,487,729,401,858.56/1,388,361.76
  6. Step 6: Final answer
    x = 1,071,571.87

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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.