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Finding the Fourth Proportional to 395,375.40, 545,608 and 220,947.08

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Solution

The fourth proportional to 395,375.40, 545,608 and 220,947.08 is: 304,901.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,375.40 : 545,608 = 220,947.08 : x
  2. Step 2: Convert to fraction form
    395,375.40/545,608 = 220,947.08/x
  3. Step 3: Cross multiply
    395,375.40x = 545,608 × 220,947.08
  4. Step 4: Simplify right side
    395,375.40x = 120,550,494,424.64
  5. Step 5: Solve for x
    x = 120,550,494,424.64/395,375.40
  6. Step 6: Final answer
    x = 304,901.35

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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.