Home / 403,015.32-556,161.11-221,723.36

Finding the Fourth Proportional to 403,015.32, 556,161.11 and 221,723.36

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Solution

The fourth proportional to 403,015.32, 556,161.11 and 221,723.36 is: 305,978.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,015.32 : 556,161.11 = 221,723.36 : x
  2. Step 2: Convert to fraction form
    403,015.32/556,161.11 = 221,723.36/x
  3. Step 3: Cross multiply
    403,015.32x = 556,161.11 × 221,723.36
  4. Step 4: Simplify right side
    403,015.32x = 123,313,906,121.11
  5. Step 5: Solve for x
    x = 123,313,906,121.11/403,015.32
  6. Step 6: Final answer
    x = 305,978.21

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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.