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Finding the Fourth Proportional to 290,495.72, 400,905.60 and 163,178.84

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Solution

The fourth proportional to 290,495.72, 400,905.60 and 163,178.84 is: 225,198.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,495.72 : 400,905.60 = 163,178.84 : x
  2. Step 2: Convert to fraction form
    290,495.72/400,905.60 = 163,178.84/x
  3. Step 3: Cross multiply
    290,495.72x = 400,905.60 × 163,178.84
  4. Step 4: Simplify right side
    290,495.72x = 65,419,310,757.50
  5. Step 5: Solve for x
    x = 65,419,310,757.50/290,495.72
  6. Step 6: Final answer
    x = 225,198.88

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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.