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Finding the Fourth Proportional to 978,780.50, 1,468,705.90 and 379,765.30

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Solution

The fourth proportional to 978,780.50, 1,468,705.90 and 379,765.30 is: 569,855.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,780.50 : 1,468,705.90 = 379,765.30 : x
  2. Step 2: Convert to fraction form
    978,780.50/1,468,705.90 = 379,765.30/x
  3. Step 3: Cross multiply
    978,780.50x = 1,468,705.90 × 379,765.30
  4. Step 4: Simplify right side
    978,780.50x = 557,763,536,725.27
  5. Step 5: Solve for x
    x = 557,763,536,725.27/978,780.50
  6. Step 6: Final answer
    x = 569,855.59

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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.