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Finding the Fourth Proportional to 227,131.90, 311,171.81 and 218,618.93

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Solution

The fourth proportional to 227,131.90, 311,171.81 and 218,618.93 is: 299,509.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    227,131.90 : 311,171.81 = 218,618.93 : x
  2. Step 2: Convert to fraction form
    227,131.90/311,171.81 = 218,618.93/x
  3. Step 3: Cross multiply
    227,131.90x = 311,171.81 × 218,618.93
  4. Step 4: Simplify right side
    227,131.90x = 68,028,049,062.93
  5. Step 5: Solve for x
    x = 68,028,049,062.93/227,131.90
  6. Step 6: Final answer
    x = 299,509.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.