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Finding the Fourth Proportional to 279,930.80, 386,302.56 and 159,062.60

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Solution

The fourth proportional to 279,930.80, 386,302.56 and 159,062.60 is: 219,505.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,930.80 : 386,302.56 = 159,062.60 : x
  2. Step 2: Convert to fraction form
    279,930.80/386,302.56 = 159,062.60/x
  3. Step 3: Cross multiply
    279,930.80x = 386,302.56 × 159,062.60
  4. Step 4: Simplify right side
    279,930.80x = 61,446,289,580.26
  5. Step 5: Solve for x
    x = 61,446,289,580.26/279,930.80
  6. Step 6: Final answer
    x = 219,505.28

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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.