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Finding the Fourth Proportional to 330,220, 455,709.28 and 179,317

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Solution

The fourth proportional to 330,220, 455,709.28 and 179,317 is: 247,460.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,220 : 455,709.28 = 179,317 : x
  2. Step 2: Convert to fraction form
    330,220/455,709.28 = 179,317/x
  3. Step 3: Cross multiply
    330,220x = 455,709.28 × 179,317
  4. Step 4: Simplify right side
    330,220x = 81,716,420,961.76
  5. Step 5: Solve for x
    x = 81,716,420,961.76/330,220
  6. Step 6: Final answer
    x = 247,460.54

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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.