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Finding the Fourth Proportional to 290,908.56, 401,451.30 and 163,581.42

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Solution

The fourth proportional to 290,908.56, 401,451.30 and 163,581.42 is: 225,740.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,908.56 : 401,451.30 = 163,581.42 : x
  2. Step 2: Convert to fraction form
    290,908.56/401,451.30 = 163,581.42/x
  3. Step 3: Cross multiply
    290,908.56x = 401,451.30 × 163,581.42
  4. Step 4: Simplify right side
    290,908.56x = 65,669,973,714.85
  5. Step 5: Solve for x
    x = 65,669,973,714.85/290,908.56
  6. Step 6: Final answer
    x = 225,740.95

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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.