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Finding the Fourth Proportional to 385,169.88, 531,532.62 and 215,404.68

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Solution

The fourth proportional to 385,169.88, 531,532.62 and 215,404.68 is: 297,257.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,169.88 : 531,532.62 = 215,404.68 : x
  2. Step 2: Convert to fraction form
    385,169.88/531,532.62 = 215,404.68/x
  3. Step 3: Cross multiply
    385,169.88x = 531,532.62 × 215,404.68
  4. Step 4: Simplify right side
    385,169.88x = 114,494,613,920.66
  5. Step 5: Solve for x
    x = 114,494,613,920.66/385,169.88
  6. Step 6: Final answer
    x = 297,257.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.