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Finding the Fourth Proportional to 330,912.80, 496,369.20 and 256,263.20

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Solution

The fourth proportional to 330,912.80, 496,369.20 and 256,263.20 is: 384,394.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,912.80 : 496,369.20 = 256,263.20 : x
  2. Step 2: Convert to fraction form
    330,912.80/496,369.20 = 256,263.20/x
  3. Step 3: Cross multiply
    330,912.80x = 496,369.20 × 256,263.20
  4. Step 4: Simplify right side
    330,912.80x = 127,201,159,573.44
  5. Step 5: Solve for x
    x = 127,201,159,573.44/330,912.80
  6. Step 6: Final answer
    x = 384,394.80

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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.