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Finding the Fourth Proportional to 436,658.38, 654,987.52 and 121,115.29

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Solution

The fourth proportional to 436,658.38, 654,987.52 and 121,115.29 is: 181,672.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,658.38 : 654,987.52 = 121,115.29 : x
  2. Step 2: Convert to fraction form
    436,658.38/654,987.52 = 121,115.29/x
  3. Step 3: Cross multiply
    436,658.38x = 654,987.52 × 121,115.29
  4. Step 4: Simplify right side
    436,658.38x = 79,328,999,550.67
  5. Step 5: Solve for x
    x = 79,328,999,550.67/436,658.38
  6. Step 6: Final answer
    x = 181,672.91

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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.