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Finding the Fourth Proportional to 680,573.76, 939,191.78 and 378,839.04

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Solution

The fourth proportional to 680,573.76, 939,191.78 and 378,839.04 is: 522,797.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,573.76 : 939,191.78 = 378,839.04 : x
  2. Step 2: Convert to fraction form
    680,573.76/939,191.78 = 378,839.04/x
  3. Step 3: Cross multiply
    680,573.76x = 939,191.78 × 378,839.04
  4. Step 4: Simplify right side
    680,573.76x = 355,802,512,311.09
  5. Step 5: Solve for x
    x = 355,802,512,311.09/680,573.76
  6. Step 6: Final answer
    x = 522,797.87

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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.