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Finding the Fourth Proportional to 386,474.55, 579,751.59 and 133,754.60

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Solution

The fourth proportional to 386,474.55, 579,751.59 and 133,754.60 is: 200,645.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,474.55 : 579,751.59 = 133,754.60 : x
  2. Step 2: Convert to fraction form
    386,474.55/579,751.59 = 133,754.60/x
  3. Step 3: Cross multiply
    386,474.55x = 579,751.59 × 133,754.60
  4. Step 4: Simplify right side
    386,474.55x = 77,544,439,121.06
  5. Step 5: Solve for x
    x = 77,544,439,121.06/386,474.55
  6. Step 6: Final answer
    x = 200,645.65

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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.