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Finding the Fourth Proportional to 458,919.87, 688,185.14 and 218,755.94

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Solution

The fourth proportional to 458,919.87, 688,185.14 and 218,755.94 is: 328,041.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,919.87 : 688,185.14 = 218,755.94 : x
  2. Step 2: Convert to fraction form
    458,919.87/688,185.14 = 218,755.94/x
  3. Step 3: Cross multiply
    458,919.87x = 688,185.14 × 218,755.94
  4. Step 4: Simplify right side
    458,919.87x = 150,544,587,194.73
  5. Step 5: Solve for x
    x = 150,544,587,194.73/458,919.87
  6. Step 6: Final answer
    x = 328,041.12

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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.