Home / 279,078.40-385,120.20-158,231.26

Finding the Fourth Proportional to 279,078.40, 385,120.20 and 158,231.26

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Solution

The fourth proportional to 279,078.40, 385,120.20 and 158,231.26 is: 218,354.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,078.40 : 385,120.20 = 158,231.26 : x
  2. Step 2: Convert to fraction form
    279,078.40/385,120.20 = 158,231.26/x
  3. Step 3: Cross multiply
    279,078.40x = 385,120.20 × 158,231.26
  4. Step 4: Simplify right side
    279,078.40x = 60,938,054,497.45
  5. Step 5: Solve for x
    x = 60,938,054,497.45/279,078.40
  6. Step 6: Final answer
    x = 218,354.61

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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.