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Finding the Fourth Proportional to 279,684.90, 385,954.96 and 170,971.31

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Solution

The fourth proportional to 279,684.90, 385,954.96 and 170,971.31 is: 235,934.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,684.90 : 385,954.96 = 170,971.31 : x
  2. Step 2: Convert to fraction form
    279,684.90/385,954.96 = 170,971.31/x
  3. Step 3: Cross multiply
    279,684.90x = 385,954.96 × 170,971.31
  4. Step 4: Simplify right side
    279,684.90x = 65,987,224,706.19
  5. Step 5: Solve for x
    x = 65,987,224,706.19/279,684.90
  6. Step 6: Final answer
    x = 235,934.17

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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.