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Finding the Fourth Proportional to 400,516.52, 552,718.50 and 221,668.52

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Solution

The fourth proportional to 400,516.52, 552,718.50 and 221,668.52 is: 305,905.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,516.52 : 552,718.50 = 221,668.52 : x
  2. Step 2: Convert to fraction form
    400,516.52/552,718.50 = 221,668.52/x
  3. Step 3: Cross multiply
    400,516.52x = 552,718.50 × 221,668.52
  4. Step 4: Simplify right side
    400,516.52x = 122,520,291,871.62
  5. Step 5: Solve for x
    x = 122,520,291,871.62/400,516.52
  6. Step 6: Final answer
    x = 305,905.71

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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.