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Finding the Fourth Proportional to 421,171.66, 631,526.13 and 207,469.36

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Solution

The fourth proportional to 421,171.66, 631,526.13 and 207,469.36 is: 311,090.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,171.66 : 631,526.13 = 207,469.36 : x
  2. Step 2: Convert to fraction form
    421,171.66/631,526.13 = 207,469.36/x
  3. Step 3: Cross multiply
    421,171.66x = 631,526.13 × 207,469.36
  4. Step 4: Simplify right side
    421,171.66x = 131,022,322,014.38
  5. Step 5: Solve for x
    x = 131,022,322,014.38/421,171.66
  6. Step 6: Final answer
    x = 311,090.07

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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.