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Finding the Fourth Proportional to 436,218.89, 654,519.49 and 211,751.69

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Solution

The fourth proportional to 436,218.89, 654,519.49 and 211,751.69 is: 317,720.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,218.89 : 654,519.49 = 211,751.69 : x
  2. Step 2: Convert to fraction form
    436,218.89/654,519.49 = 211,751.69/x
  3. Step 3: Cross multiply
    436,218.89x = 654,519.49 × 211,751.69
  4. Step 4: Simplify right side
    436,218.89x = 138,595,604,343.46
  5. Step 5: Solve for x
    x = 138,595,604,343.46/436,218.89
  6. Step 6: Final answer
    x = 317,720.32

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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.