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Finding the Fourth Proportional to 436,398.84, 654,613.38 and 120,879

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Solution

The fourth proportional to 436,398.84, 654,613.38 and 120,879 is: 181,322.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,398.84 : 654,613.38 = 120,879 : x
  2. Step 2: Convert to fraction form
    436,398.84/654,613.38 = 120,879/x
  3. Step 3: Cross multiply
    436,398.84x = 654,613.38 × 120,879
  4. Step 4: Simplify right side
    436,398.84x = 79,129,010,761.02
  5. Step 5: Solve for x
    x = 79,129,010,761.02/436,398.84
  6. Step 6: Final answer
    x = 181,322.69

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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.