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Finding the Fourth Proportional to 685,072.54, 945,393.14 and 379,149.51

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Solution

The fourth proportional to 685,072.54, 945,393.14 and 379,149.51 is: 523,222.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,072.54 : 945,393.14 = 379,149.51 : x
  2. Step 2: Convert to fraction form
    685,072.54/945,393.14 = 379,149.51/x
  3. Step 3: Cross multiply
    685,072.54x = 945,393.14 × 379,149.51
  4. Step 4: Simplify right side
    685,072.54x = 358,445,346,556.18
  5. Step 5: Solve for x
    x = 358,445,346,556.18/685,072.54
  6. Step 6: Final answer
    x = 523,222.47

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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.