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Finding the Fourth Proportional to 328,525.95, 492,792.88 and 128,940.33

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Solution

The fourth proportional to 328,525.95, 492,792.88 and 128,940.33 is: 193,412.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,525.95 : 492,792.88 = 128,940.33 : x
  2. Step 2: Convert to fraction form
    328,525.95/492,792.88 = 128,940.33/x
  3. Step 3: Cross multiply
    328,525.95x = 492,792.88 × 128,940.33
  4. Step 4: Simplify right side
    328,525.95x = 63,540,876,568.85
  5. Step 5: Solve for x
    x = 63,540,876,568.85/328,525.95
  6. Step 6: Final answer
    x = 193,412.05

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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.