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Finding the Fourth Proportional to 400,515.52, 552,717.12 and 221,667.52

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Solution

The fourth proportional to 400,515.52, 552,717.12 and 221,667.52 is: 305,904.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,515.52 : 552,717.12 = 221,667.52 : x
  2. Step 2: Convert to fraction form
    400,515.52/552,717.12 = 221,667.52/x
  3. Step 3: Cross multiply
    400,515.52x = 552,717.12 × 221,667.52
  4. Step 4: Simplify right side
    400,515.52x = 122,519,433,251.94
  5. Step 5: Solve for x
    x = 122,519,433,251.94/400,515.52
  6. Step 6: Final answer
    x = 305,904.33

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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.