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Finding the Fourth Proportional to 279,074.82, 385,128.09 and 151,751.19

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Solution

The fourth proportional to 279,074.82, 385,128.09 and 151,751.19 is: 209,419.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,074.82 : 385,128.09 = 151,751.19 : x
  2. Step 2: Convert to fraction form
    279,074.82/385,128.09 = 151,751.19/x
  3. Step 3: Cross multiply
    279,074.82x = 385,128.09 × 151,751.19
  4. Step 4: Simplify right side
    279,074.82x = 58,443,645,959.93
  5. Step 5: Solve for x
    x = 58,443,645,959.93/279,074.82
  6. Step 6: Final answer
    x = 209,419.27

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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.