Home / 310,116.33-428,007.38-189,328.05

Finding the Fourth Proportional to 310,116.33, 428,007.38 and 189,328.05

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Solution

The fourth proportional to 310,116.33, 428,007.38 and 189,328.05 is: 261,301.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,116.33 : 428,007.38 = 189,328.05 : x
  2. Step 2: Convert to fraction form
    310,116.33/428,007.38 = 189,328.05/x
  3. Step 3: Cross multiply
    310,116.33x = 428,007.38 × 189,328.05
  4. Step 4: Simplify right side
    310,116.33x = 81,033,801,694.37
  5. Step 5: Solve for x
    x = 81,033,801,694.37/310,116.33
  6. Step 6: Final answer
    x = 261,301.30

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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.