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Finding the Fourth Proportional to 268,584.60, 402,390.90 and 212,791.80

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Solution

The fourth proportional to 268,584.60, 402,390.90 and 212,791.80 is: 318,802.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,584.60 : 402,390.90 = 212,791.80 : x
  2. Step 2: Convert to fraction form
    268,584.60/402,390.90 = 212,791.80/x
  3. Step 3: Cross multiply
    268,584.60x = 402,390.90 × 212,791.80
  4. Step 4: Simplify right side
    268,584.60x = 85,625,483,914.62
  5. Step 5: Solve for x
    x = 85,625,483,914.62/268,584.60
  6. Step 6: Final answer
    x = 318,802.66

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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.