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Finding the Fourth Proportional to 388,507.49, 582,844.61 and 220,108.49

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Solution

The fourth proportional to 388,507.49, 582,844.61 and 220,108.49 is: 330,209.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,507.49 : 582,844.61 = 220,108.49 : x
  2. Step 2: Convert to fraction form
    388,507.49/582,844.61 = 220,108.49/x
  3. Step 3: Cross multiply
    388,507.49x = 582,844.61 × 220,108.49
  4. Step 4: Simplify right side
    388,507.49x = 128,289,046,833.45
  5. Step 5: Solve for x
    x = 128,289,046,833.45/388,507.49
  6. Step 6: Final answer
    x = 330,209.97

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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.