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Finding the Fourth Proportional to 631,711.72, 871,764.42 and 345,231.73

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Solution

The fourth proportional to 631,711.72, 871,764.42 and 345,231.73 is: 476,421.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,711.72 : 871,764.42 = 345,231.73 : x
  2. Step 2: Convert to fraction form
    631,711.72/871,764.42 = 345,231.73/x
  3. Step 3: Cross multiply
    631,711.72x = 871,764.42 × 345,231.73
  4. Step 4: Simplify right side
    631,711.72x = 300,960,738,869.05
  5. Step 5: Solve for x
    x = 300,960,738,869.05/631,711.72
  6. Step 6: Final answer
    x = 476,421.02

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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.