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Finding the Fourth Proportional to 978,673.90, 1,467,512.70 and 379,806.88

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Solution

The fourth proportional to 978,673.90, 1,467,512.70 and 379,806.88 is: 569,517.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,673.90 : 1,467,512.70 = 379,806.88 : x
  2. Step 2: Convert to fraction form
    978,673.90/1,467,512.70 = 379,806.88/x
  3. Step 3: Cross multiply
    978,673.90x = 1,467,512.70 × 379,806.88
  4. Step 4: Simplify right side
    978,673.90x = 557,371,419,947.38
  5. Step 5: Solve for x
    x = 557,371,419,947.38/978,673.90
  6. Step 6: Final answer
    x = 569,517.00

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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.