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Finding the Fourth Proportional to 388,612.68, 582,939.72 and 122,394

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Solution

The fourth proportional to 388,612.68, 582,939.72 and 122,394 is: 183,597.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,612.68 : 582,939.72 = 122,394 : x
  2. Step 2: Convert to fraction form
    388,612.68/582,939.72 = 122,394/x
  3. Step 3: Cross multiply
    388,612.68x = 582,939.72 × 122,394
  4. Step 4: Simplify right side
    388,612.68x = 71,348,324,089.68
  5. Step 5: Solve for x
    x = 71,348,324,089.68/388,612.68
  6. Step 6: Final answer
    x = 183,597.52

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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.