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Finding the Fourth Proportional to 394,090,234.60, 591,135,351.90 and 248,971,412.20

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Solution

The fourth proportional to 394,090,234.60, 591,135,351.90 and 248,971,412.20 is: 373,457,118.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,090,234.60 : 591,135,351.90 = 248,971,412.20 : x
  2. Step 2: Convert to fraction form
    394,090,234.60/591,135,351.90 = 248,971,412.20/x
  3. Step 3: Cross multiply
    394,090,234.60x = 591,135,351.90 × 248,971,412.20
  4. Step 4: Simplify right side
    394,090,234.60x = 147,175,803,363,886,944
  5. Step 5: Solve for x
    x = 147,175,803,363,886,944/394,090,234.60
  6. Step 6: Final answer
    x = 373,457,118.30

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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.