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Finding the Fourth Proportional to 348,689.86, 479,682 and 305,474.74

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Solution

The fourth proportional to 348,689.86, 479,682 and 305,474.74 is: 420,232.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,689.86 : 479,682 = 305,474.74 : x
  2. Step 2: Convert to fraction form
    348,689.86/479,682 = 305,474.74/x
  3. Step 3: Cross multiply
    348,689.86x = 479,682 × 305,474.74
  4. Step 4: Simplify right side
    348,689.86x = 146,530,734,232.68
  5. Step 5: Solve for x
    x = 146,530,734,232.68/348,689.86
  6. Step 6: Final answer
    x = 420,232.28

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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.