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Finding the Fourth Proportional to 680,652, 939,299.76 and 378,839.52

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Solution

The fourth proportional to 680,652, 939,299.76 and 378,839.52 is: 522,798.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,652 : 939,299.76 = 378,839.52 : x
  2. Step 2: Convert to fraction form
    680,652/939,299.76 = 378,839.52/x
  3. Step 3: Cross multiply
    680,652x = 939,299.76 × 378,839.52
  4. Step 4: Simplify right side
    680,652x = 355,843,870,214.52
  5. Step 5: Solve for x
    x = 355,843,870,214.52/680,652
  6. Step 6: Final answer
    x = 522,798.54

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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.