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Finding the Fourth Proportional to 395,116.29, 545,201.78 and 239,986.84

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Solution

The fourth proportional to 395,116.29, 545,201.78 and 239,986.84 is: 331,146.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,116.29 : 545,201.78 = 239,986.84 : x
  2. Step 2: Convert to fraction form
    395,116.29/545,201.78 = 239,986.84/x
  3. Step 3: Cross multiply
    395,116.29x = 545,201.78 × 239,986.84
  4. Step 4: Simplify right side
    395,116.29x = 130,841,252,344.58
  5. Step 5: Solve for x
    x = 130,841,252,344.58/395,116.29
  6. Step 6: Final answer
    x = 331,146.19

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1.5x scale

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.