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Finding the Fourth Proportional to 388,121.67, 582,149.15 and 236,279.34

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Solution

The fourth proportional to 388,121.67, 582,149.15 and 236,279.34 is: 354,398.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,121.67 : 582,149.15 = 236,279.34 : x
  2. Step 2: Convert to fraction form
    388,121.67/582,149.15 = 236,279.34/x
  3. Step 3: Cross multiply
    388,121.67x = 582,149.15 × 236,279.34
  4. Step 4: Simplify right side
    388,121.67x = 137,549,816,943.56
  5. Step 5: Solve for x
    x = 137,549,816,943.56/388,121.67
  6. Step 6: Final answer
    x = 354,398.70

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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.