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Finding the Fourth Proportional to 394,356, 544,211.28 and 215,508

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Solution

The fourth proportional to 394,356, 544,211.28 and 215,508 is: 297,401.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,356 : 544,211.28 = 215,508 : x
  2. Step 2: Convert to fraction form
    394,356/544,211.28 = 215,508/x
  3. Step 3: Cross multiply
    394,356x = 544,211.28 × 215,508
  4. Step 4: Simplify right side
    394,356x = 117,281,884,530.24
  5. Step 5: Solve for x
    x = 117,281,884,530.24/394,356
  6. Step 6: Final answer
    x = 297,401.04

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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.