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Finding the Fourth Proportional to 386,488.54, 579,772.54 and 133,768.62

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Solution

The fourth proportional to 386,488.54, 579,772.54 and 133,768.62 is: 200,666.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,488.54 : 579,772.54 = 133,768.62 : x
  2. Step 2: Convert to fraction form
    386,488.54/579,772.54 = 133,768.62/x
  3. Step 3: Cross multiply
    386,488.54x = 579,772.54 × 133,768.62
  4. Step 4: Simplify right side
    386,488.54x = 77,555,370,805.84
  5. Step 5: Solve for x
    x = 77,555,370,805.84/386,488.54
  6. Step 6: Final answer
    x = 200,666.68

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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.