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Finding the Fourth Proportional to 631,806.57, 871,880.22 and 345,328.71

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Solution

The fourth proportional to 631,806.57, 871,880.22 and 345,328.71 is: 476,546.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,806.57 : 871,880.22 = 345,328.71 : x
  2. Step 2: Convert to fraction form
    631,806.57/871,880.22 = 345,328.71/x
  3. Step 3: Cross multiply
    631,806.57x = 871,880.22 × 345,328.71
  4. Step 4: Simplify right side
    631,806.57x = 301,085,272,942.10
  5. Step 5: Solve for x
    x = 301,085,272,942.10/631,806.57
  6. Step 6: Final answer
    x = 476,546.60

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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.