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Finding the Fourth Proportional to 631,344.72, 871,255.69 and 340,956.26

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Solution

The fourth proportional to 631,344.72, 871,255.69 and 340,956.26 is: 470,519.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,344.72 : 871,255.69 = 340,956.26 : x
  2. Step 2: Convert to fraction form
    631,344.72/871,255.69 = 340,956.26/x
  3. Step 3: Cross multiply
    631,344.72x = 871,255.69 × 340,956.26
  4. Step 4: Simplify right side
    631,344.72x = 297,060,083,723.11
  5. Step 5: Solve for x
    x = 297,060,083,723.11/631,344.72
  6. Step 6: Final answer
    x = 470,519.63

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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.