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Finding the Fourth Proportional to 399,812.39, 599,630.13 and 115,441.22

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Solution

The fourth proportional to 399,812.39, 599,630.13 and 115,441.22 is: 173,136.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,812.39 : 599,630.13 = 115,441.22 : x
  2. Step 2: Convert to fraction form
    399,812.39/599,630.13 = 115,441.22/x
  3. Step 3: Cross multiply
    399,812.39x = 599,630.13 × 115,441.22
  4. Step 4: Simplify right side
    399,812.39x = 69,222,030,757.81
  5. Step 5: Solve for x
    x = 69,222,030,757.81/399,812.39
  6. Step 6: Final answer
    x = 173,136.28

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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.