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Finding the Fourth Proportional to 479,942.67, 662,401.76 and 278,855.31

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Solution

The fourth proportional to 479,942.67, 662,401.76 and 278,855.31 is: 384,867.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,942.67 : 662,401.76 = 278,855.31 : x
  2. Step 2: Convert to fraction form
    479,942.67/662,401.76 = 278,855.31/x
  3. Step 3: Cross multiply
    479,942.67x = 662,401.76 × 278,855.31
  4. Step 4: Simplify right side
    479,942.67x = 184,714,246,735.07
  5. Step 5: Solve for x
    x = 184,714,246,735.07/479,942.67
  6. Step 6: Final answer
    x = 384,867.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.