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Finding the Fourth Proportional to 386,376.86, 579,156.24 and 129,965.33

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Solution

The fourth proportional to 386,376.86, 579,156.24 and 129,965.33 is: 194,810.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,376.86 : 579,156.24 = 129,965.33 : x
  2. Step 2: Convert to fraction form
    386,376.86/579,156.24 = 129,965.33/x
  3. Step 3: Cross multiply
    386,376.86x = 579,156.24 × 129,965.33
  4. Step 4: Simplify right side
    386,376.86x = 75,270,231,203.33
  5. Step 5: Solve for x
    x = 75,270,231,203.33/386,376.86
  6. Step 6: Final answer
    x = 194,810.40

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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.