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Finding the Fourth Proportional to 485,015.75, 669,216.17 and 294,076.07

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Solution

The fourth proportional to 485,015.75, 669,216.17 and 294,076.07 is: 405,760.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,015.75 : 669,216.17 = 294,076.07 : x
  2. Step 2: Convert to fraction form
    485,015.75/669,216.17 = 294,076.07/x
  3. Step 3: Cross multiply
    485,015.75x = 669,216.17 × 294,076.07
  4. Step 4: Simplify right side
    485,015.75x = 196,800,461,254.05
  5. Step 5: Solve for x
    x = 196,800,461,254.05/485,015.75
  6. Step 6: Final answer
    x = 405,760.97

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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.