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Finding the Fourth Proportional to 328,706.79, 493,134.09 and 104,080.65

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Solution

The fourth proportional to 328,706.79, 493,134.09 and 104,080.65 is: 156,144.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,706.79 : 493,134.09 = 104,080.65 : x
  2. Step 2: Convert to fraction form
    328,706.79/493,134.09 = 104,080.65/x
  3. Step 3: Cross multiply
    328,706.79x = 493,134.09 × 104,080.65
  4. Step 4: Simplify right side
    328,706.79x = 51,325,716,624.36
  5. Step 5: Solve for x
    x = 51,325,716,624.36/328,706.79
  6. Step 6: Final answer
    x = 156,144.38

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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.