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Finding the Fourth Proportional to 330,339.08, 455,662.29 and 275,007.20

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Solution

The fourth proportional to 330,339.08, 455,662.29 and 275,007.20 is: 379,338.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,339.08 : 455,662.29 = 275,007.20 : x
  2. Step 2: Convert to fraction form
    330,339.08/455,662.29 = 275,007.20/x
  3. Step 3: Cross multiply
    330,339.08x = 455,662.29 × 275,007.20
  4. Step 4: Simplify right side
    330,339.08x = 125,310,410,518.49
  5. Step 5: Solve for x
    x = 125,310,410,518.49/330,339.08
  6. Step 6: Final answer
    x = 379,338.74

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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.