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Finding the Fourth Proportional to 978,335.10, 1,467,757.80 and 379,315.80

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Solution

The fourth proportional to 978,335.10, 1,467,757.80 and 379,315.80 is: 569,072.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,335.10 : 1,467,757.80 = 379,315.80 : x
  2. Step 2: Convert to fraction form
    978,335.10/1,467,757.80 = 379,315.80/x
  3. Step 3: Cross multiply
    978,335.10x = 1,467,757.80 × 379,315.80
  4. Step 4: Simplify right side
    978,335.10x = 556,743,724,113.24
  5. Step 5: Solve for x
    x = 556,743,724,113.24/978,335.10
  6. Step 6: Final answer
    x = 569,072.63

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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.