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Finding the Fourth Proportional to 391,563.90, 540,309.96 and 238,546.62

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Solution

The fourth proportional to 391,563.90, 540,309.96 and 238,546.62 is: 329,164.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,563.90 : 540,309.96 = 238,546.62 : x
  2. Step 2: Convert to fraction form
    391,563.90/540,309.96 = 238,546.62/x
  3. Step 3: Cross multiply
    391,563.90x = 540,309.96 × 238,546.62
  4. Step 4: Simplify right side
    391,563.90x = 128,889,114,710.34
  5. Step 5: Solve for x
    x = 128,889,114,710.34/391,563.90
  6. Step 6: Final answer
    x = 329,164.96

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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.