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Finding the Fourth Proportional to 391,652.06, 540,431.39 and 238,634.66

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Solution

The fourth proportional to 391,652.06, 540,431.39 and 238,634.66 is: 329,286.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,652.06 : 540,431.39 = 238,634.66 : x
  2. Step 2: Convert to fraction form
    391,652.06/540,431.39 = 238,634.66/x
  3. Step 3: Cross multiply
    391,652.06x = 540,431.39 × 238,634.66
  4. Step 4: Simplify right side
    391,652.06x = 128,965,659,913.72
  5. Step 5: Solve for x
    x = 128,965,659,913.72/391,652.06
  6. Step 6: Final answer
    x = 329,286.31

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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.