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Finding the Fourth Proportional to 393,270.69, 542,759.64 and 223,530.33

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Solution

The fourth proportional to 393,270.69, 542,759.64 and 223,530.33 is: 308,498.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,270.69 : 542,759.64 = 223,530.33 : x
  2. Step 2: Convert to fraction form
    393,270.69/542,759.64 = 223,530.33/x
  3. Step 3: Cross multiply
    393,270.69x = 542,759.64 × 223,530.33
  4. Step 4: Simplify right side
    393,270.69x = 121,323,241,439.88
  5. Step 5: Solve for x
    x = 121,323,241,439.88/393,270.69
  6. Step 6: Final answer
    x = 308,498.05

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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.