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Finding the Fourth Proportional to 308,228.81, 425,353.12 and 172,268.48

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Solution

The fourth proportional to 308,228.81, 425,353.12 and 172,268.48 is: 237,729.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,228.81 : 425,353.12 = 172,268.48 : x
  2. Step 2: Convert to fraction form
    308,228.81/425,353.12 = 172,268.48/x
  3. Step 3: Cross multiply
    308,228.81x = 425,353.12 × 172,268.48
  4. Step 4: Simplify right side
    308,228.81x = 73,274,936,078.37
  5. Step 5: Solve for x
    x = 73,274,936,078.37/308,228.81
  6. Step 6: Final answer
    x = 237,729.03

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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.