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Finding the Fourth Proportional to 319,861.40, 479,964.90 and 132,891.80

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Solution

The fourth proportional to 319,861.40, 479,964.90 and 132,891.80 is: 199,409.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,861.40 : 479,964.90 = 132,891.80 : x
  2. Step 2: Convert to fraction form
    319,861.40/479,964.90 = 132,891.80/x
  3. Step 3: Cross multiply
    319,861.40x = 479,964.90 × 132,891.80
  4. Step 4: Simplify right side
    319,861.40x = 63,783,399,497.82
  5. Step 5: Solve for x
    x = 63,783,399,497.82/319,861.40
  6. Step 6: Final answer
    x = 199,409.49

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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.