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Finding the Fourth Proportional to 436,661.50, 654,992.20 and 121,118.42

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Solution

The fourth proportional to 436,661.50, 654,992.20 and 121,118.42 is: 181,677.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,661.50 : 654,992.20 = 121,118.42 : x
  2. Step 2: Convert to fraction form
    436,661.50/654,992.20 = 121,118.42/x
  3. Step 3: Cross multiply
    436,661.50x = 654,992.20 × 121,118.42
  4. Step 4: Simplify right side
    436,661.50x = 79,331,617,404.16
  5. Step 5: Solve for x
    x = 79,331,617,404.16/436,661.50
  6. Step 6: Final answer
    x = 181,677.61

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1.5x scale

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.