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Finding the Fourth Proportional to 279,159.28, 385,301.81 and 170,287.68

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Solution

The fourth proportional to 279,159.28, 385,301.81 and 170,287.68 is: 235,034.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,159.28 : 385,301.81 = 170,287.68 : x
  2. Step 2: Convert to fraction form
    279,159.28/385,301.81 = 170,287.68/x
  3. Step 3: Cross multiply
    279,159.28x = 385,301.81 × 170,287.68
  4. Step 4: Simplify right side
    279,159.28x = 65,612,148,546.75
  5. Step 5: Solve for x
    x = 65,612,148,546.75/279,159.28
  6. Step 6: Final answer
    x = 235,034.81

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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.