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Finding the Fourth Proportional to 252,989.31, 379,833.89 and 128,417.79

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Solution

The fourth proportional to 252,989.31, 379,833.89 and 128,417.79 is: 192,804.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,989.31 : 379,833.89 = 128,417.79 : x
  2. Step 2: Convert to fraction form
    252,989.31/379,833.89 = 128,417.79/x
  3. Step 3: Cross multiply
    252,989.31x = 379,833.89 × 128,417.79
  4. Step 4: Simplify right side
    252,989.31x = 48,777,428,078.81
  5. Step 5: Solve for x
    x = 48,777,428,078.81/252,989.31
  6. Step 6: Final answer
    x = 192,804.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.