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Finding the Fourth Proportional to 436,761.64, 655,142.26 and 121,218.45

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Solution

The fourth proportional to 436,761.64, 655,142.26 and 121,218.45 is: 181,827.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,761.64 : 655,142.26 = 121,218.45 : x
  2. Step 2: Convert to fraction form
    436,761.64/655,142.26 = 121,218.45/x
  3. Step 3: Cross multiply
    436,761.64x = 655,142.26 × 121,218.45
  4. Step 4: Simplify right side
    436,761.64x = 79,415,329,286.70
  5. Step 5: Solve for x
    x = 79,415,329,286.70/436,761.64
  6. Step 6: Final answer
    x = 181,827.62

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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.