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Finding the Fourth Proportional to 386,653.26, 579,841.51 and 133,865.90

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Solution

The fourth proportional to 386,653.26, 579,841.51 and 133,865.90 is: 200,750.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,653.26 : 579,841.51 = 133,865.90 : x
  2. Step 2: Convert to fraction form
    386,653.26/579,841.51 = 133,865.90/x
  3. Step 3: Cross multiply
    386,653.26x = 579,841.51 × 133,865.90
  4. Step 4: Simplify right side
    386,653.26x = 77,621,002,694.30
  5. Step 5: Solve for x
    x = 77,621,002,694.30/386,653.26
  6. Step 6: Final answer
    x = 200,750.93

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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.