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Finding the Fourth Proportional to 290,717.80, 436,076.70 and 211,402.60

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Solution

The fourth proportional to 290,717.80, 436,076.70 and 211,402.60 is: 317,103.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,717.80 : 436,076.70 = 211,402.60 : x
  2. Step 2: Convert to fraction form
    290,717.80/436,076.70 = 211,402.60/x
  3. Step 3: Cross multiply
    290,717.80x = 436,076.70 × 211,402.60
  4. Step 4: Simplify right side
    290,717.80x = 92,187,748,179.42
  5. Step 5: Solve for x
    x = 92,187,748,179.42/290,717.80
  6. Step 6: Final answer
    x = 317,103.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.