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Finding the Fourth Proportional to 279,374.87, 385,564.25 and 172,007.75

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Solution

The fourth proportional to 279,374.87, 385,564.25 and 172,007.75 is: 237,387.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,374.87 : 385,564.25 = 172,007.75 : x
  2. Step 2: Convert to fraction form
    279,374.87/385,564.25 = 172,007.75/x
  3. Step 3: Cross multiply
    279,374.87x = 385,564.25 × 172,007.75
  4. Step 4: Simplify right side
    279,374.87x = 66,320,040,516.87
  5. Step 5: Solve for x
    x = 66,320,040,516.87/279,374.87
  6. Step 6: Final answer
    x = 237,387.28

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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.