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Finding the Fourth Proportional to 330,338.58, 455,661.60 and 275,006.70

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Solution

The fourth proportional to 330,338.58, 455,661.60 and 275,006.70 is: 379,338.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,338.58 : 455,661.60 = 275,006.70 : x
  2. Step 2: Convert to fraction form
    330,338.58/455,661.60 = 275,006.70/x
  3. Step 3: Cross multiply
    330,338.58x = 455,661.60 × 275,006.70
  4. Step 4: Simplify right side
    330,338.58x = 125,309,992,932.72
  5. Step 5: Solve for x
    x = 125,309,992,932.72/330,338.58
  6. Step 6: Final answer
    x = 379,338.05

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1.5x scale

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.