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Finding the Fourth Proportional to 354,471.12, 489,333.96 and 218,529.36

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Solution

The fourth proportional to 354,471.12, 489,333.96 and 218,529.36 is: 301,671.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,471.12 : 489,333.96 = 218,529.36 : x
  2. Step 2: Convert to fraction form
    354,471.12/489,333.96 = 218,529.36/x
  3. Step 3: Cross multiply
    354,471.12x = 489,333.96 × 218,529.36
  4. Step 4: Simplify right side
    354,471.12x = 106,933,837,105.07
  5. Step 5: Solve for x
    x = 106,933,837,105.07/354,471.12
  6. Step 6: Final answer
    x = 301,671.51

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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.