Home / 418,961.96-628,541.36-138,479.22

Finding the Fourth Proportional to 418,961.96, 628,541.36 and 138,479.22

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Solution

The fourth proportional to 418,961.96, 628,541.36 and 138,479.22 is: 207,751.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,961.96 : 628,541.36 = 138,479.22 : x
  2. Step 2: Convert to fraction form
    418,961.96/628,541.36 = 138,479.22/x
  3. Step 3: Cross multiply
    418,961.96x = 628,541.36 × 138,479.22
  4. Step 4: Simplify right side
    418,961.96x = 87,039,917,270.54
  5. Step 5: Solve for x
    x = 87,039,917,270.54/418,961.96
  6. Step 6: Final answer
    x = 207,751.36

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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.