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Finding the Fourth Proportional to 388,188.38, 535,698.86 and 218,422.52

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Solution

The fourth proportional to 388,188.38, 535,698.86 and 218,422.52 is: 301,422.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,188.38 : 535,698.86 = 218,422.52 : x
  2. Step 2: Convert to fraction form
    388,188.38/535,698.86 = 218,422.52/x
  3. Step 3: Cross multiply
    388,188.38x = 535,698.86 × 218,422.52
  4. Step 4: Simplify right side
    388,188.38x = 117,008,694,962.33
  5. Step 5: Solve for x
    x = 117,008,694,962.33/388,188.38
  6. Step 6: Final answer
    x = 301,422.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.