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Finding the Fourth Proportional to 631,509.62, 871,495.81 and 345,047.45

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Solution

The fourth proportional to 631,509.62, 871,495.81 and 345,047.45 is: 476,172.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,509.62 : 871,495.81 = 345,047.45 : x
  2. Step 2: Convert to fraction form
    631,509.62/871,495.81 = 345,047.45/x
  3. Step 3: Cross multiply
    631,509.62x = 871,495.81 × 345,047.45
  4. Step 4: Simplify right side
    631,509.62x = 300,707,401,706.09
  5. Step 5: Solve for x
    x = 300,707,401,706.09/631,509.62
  6. Step 6: Final answer
    x = 476,172.33

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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.