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Finding the Fourth Proportional to 291,214.09, 401,808.95 and 163,843.21

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Solution

The fourth proportional to 291,214.09, 401,808.95 and 163,843.21 is: 226,066.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,214.09 : 401,808.95 = 163,843.21 : x
  2. Step 2: Convert to fraction form
    291,214.09/401,808.95 = 163,843.21/x
  3. Step 3: Cross multiply
    291,214.09x = 401,808.95 × 163,843.21
  4. Step 4: Simplify right side
    291,214.09x = 65,833,668,174.73
  5. Step 5: Solve for x
    x = 65,833,668,174.73/291,214.09
  6. Step 6: Final answer
    x = 226,066.22

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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.