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Finding the Fourth Proportional to 388,236.38, 582,379.68 and 122,008.01

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Solution

The fourth proportional to 388,236.38, 582,379.68 and 122,008.01 is: 183,019.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,236.38 : 582,379.68 = 122,008.01 : x
  2. Step 2: Convert to fraction form
    388,236.38/582,379.68 = 122,008.01/x
  3. Step 3: Cross multiply
    388,236.38x = 582,379.68 × 122,008.01
  4. Step 4: Simplify right side
    388,236.38x = 71,054,985,821.24
  5. Step 5: Solve for x
    x = 71,054,985,821.24/388,236.38
  6. Step 6: Final answer
    x = 183,019.91

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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.