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Finding the Fourth Proportional to 328,124.71, 491,860.03 and 138,632.80

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Solution

The fourth proportional to 328,124.71, 491,860.03 and 138,632.80 is: 207,811.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,124.71 : 491,860.03 = 138,632.80 : x
  2. Step 2: Convert to fraction form
    328,124.71/491,860.03 = 138,632.80/x
  3. Step 3: Cross multiply
    328,124.71x = 491,860.03 × 138,632.80
  4. Step 4: Simplify right side
    328,124.71x = 68,187,933,166.98
  5. Step 5: Solve for x
    x = 68,187,933,166.98/328,124.71
  6. Step 6: Final answer
    x = 207,811.03

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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.