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Finding the Fourth Proportional to 978,910.80, 1,467,928.80 and 379,672.80

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Solution

The fourth proportional to 978,910.80, 1,467,928.80 and 379,672.80 is: 569,339.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,910.80 : 1,467,928.80 = 379,672.80 : x
  2. Step 2: Convert to fraction form
    978,910.80/1,467,928.80 = 379,672.80/x
  3. Step 3: Cross multiply
    978,910.80x = 1,467,928.80 × 379,672.80
  4. Step 4: Simplify right side
    978,910.80x = 557,332,637,696.64
  5. Step 5: Solve for x
    x = 557,332,637,696.64/978,910.80
  6. Step 6: Final answer
    x = 569,339.55

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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.