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Finding the Fourth Proportional to 330,738.30, 496,107.45 and 212,640.30

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Solution

The fourth proportional to 330,738.30, 496,107.45 and 212,640.30 is: 318,960.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,738.30 : 496,107.45 = 212,640.30 : x
  2. Step 2: Convert to fraction form
    330,738.30/496,107.45 = 212,640.30/x
  3. Step 3: Cross multiply
    330,738.30x = 496,107.45 × 212,640.30
  4. Step 4: Simplify right side
    330,738.30x = 105,492,437,000.24
  5. Step 5: Solve for x
    x = 105,492,437,000.24/330,738.30
  6. Step 6: Final answer
    x = 318,960.45

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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.