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Finding the Fourth Proportional to 330,928.80, 496,393.20 and 256,279.20

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Solution

The fourth proportional to 330,928.80, 496,393.20 and 256,279.20 is: 384,418.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,928.80 : 496,393.20 = 256,279.20 : x
  2. Step 2: Convert to fraction form
    330,928.80/496,393.20 = 256,279.20/x
  3. Step 3: Cross multiply
    330,928.80x = 496,393.20 × 256,279.20
  4. Step 4: Simplify right side
    330,928.80x = 127,215,252,181.44
  5. Step 5: Solve for x
    x = 127,215,252,181.44/330,928.80
  6. Step 6: Final answer
    x = 384,418.80

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1.5x scale

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.