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Finding the Fourth Proportional to 238,426.80, 357,640.20 and 212,161.20

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Solution

The fourth proportional to 238,426.80, 357,640.20 and 212,161.20 is: 318,241.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,426.80 : 357,640.20 = 212,161.20 : x
  2. Step 2: Convert to fraction form
    238,426.80/357,640.20 = 212,161.20/x
  3. Step 3: Cross multiply
    238,426.80x = 357,640.20 × 212,161.20
  4. Step 4: Simplify right side
    238,426.80x = 75,877,374,000.24
  5. Step 5: Solve for x
    x = 75,877,374,000.24/238,426.80
  6. Step 6: Final answer
    x = 318,241.80

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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.