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Finding the Fourth Proportional to 328,644.20, 492,964.70 and 128,823.40

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Solution

The fourth proportional to 328,644.20, 492,964.70 and 128,823.40 is: 193,234.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,644.20 : 492,964.70 = 128,823.40 : x
  2. Step 2: Convert to fraction form
    328,644.20/492,964.70 = 128,823.40/x
  3. Step 3: Cross multiply
    328,644.20x = 492,964.70 × 128,823.40
  4. Step 4: Simplify right side
    328,644.20x = 63,505,388,733.98
  5. Step 5: Solve for x
    x = 63,505,388,733.98/328,644.20
  6. Step 6: Final answer
    x = 193,234.47

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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.