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Finding the Fourth Proportional to 386,311.14, 579,626.13 and 208,608.88

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Solution

The fourth proportional to 386,311.14, 579,626.13 and 208,608.88 is: 312,999.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,311.14 : 579,626.13 = 208,608.88 : x
  2. Step 2: Convert to fraction form
    386,311.14/579,626.13 = 208,608.88/x
  3. Step 3: Cross multiply
    386,311.14x = 579,626.13 × 208,608.88
  4. Step 4: Simplify right side
    386,311.14x = 120,915,157,798.03
  5. Step 5: Solve for x
    x = 120,915,157,798.03/386,311.14
  6. Step 6: Final answer
    x = 312,999.41

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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.