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Finding the Fourth Proportional to 345,447.97, 518,171.96 and 134,938.28

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Solution

The fourth proportional to 345,447.97, 518,171.96 and 134,938.28 is: 202,407.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,447.97 : 518,171.96 = 134,938.28 : x
  2. Step 2: Convert to fraction form
    345,447.97/518,171.96 = 134,938.28/x
  3. Step 3: Cross multiply
    345,447.97x = 518,171.96 × 134,938.28
  4. Step 4: Simplify right side
    345,447.97x = 69,921,233,026.63
  5. Step 5: Solve for x
    x = 69,921,233,026.63/345,447.97
  6. Step 6: Final answer
    x = 202,407.42

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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.