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Finding the Fourth Proportional to 680,943, 939,707.88 and 379,143.48

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Solution

The fourth proportional to 680,943, 939,707.88 and 379,143.48 is: 523,221.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,943 : 939,707.88 = 379,143.48 : x
  2. Step 2: Convert to fraction form
    680,943/939,707.88 = 379,143.48/x
  3. Step 3: Cross multiply
    680,943x = 939,707.88 × 379,143.48
  4. Step 4: Simplify right side
    680,943x = 356,284,115,806.62
  5. Step 5: Solve for x
    x = 356,284,115,806.62/680,943
  6. Step 6: Final answer
    x = 523,221.64

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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.