Home / 279,131.28-385,209.78-158,277.60

Finding the Fourth Proportional to 279,131.28, 385,209.78 and 158,277.60

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Solution

The fourth proportional to 279,131.28, 385,209.78 and 158,277.60 is: 218,427.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,131.28 : 385,209.78 = 158,277.60 : x
  2. Step 2: Convert to fraction form
    279,131.28/385,209.78 = 158,277.60/x
  3. Step 3: Cross multiply
    279,131.28x = 385,209.78 × 158,277.60
  4. Step 4: Simplify right side
    279,131.28x = 60,970,079,474.93
  5. Step 5: Solve for x
    x = 60,970,079,474.93/279,131.28
  6. Step 6: Final answer
    x = 218,427.97

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1.5x scale

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.