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Finding the Fourth Proportional to 275,145.76, 379,716.96 and 154,325.80

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Solution

The fourth proportional to 275,145.76, 379,716.96 and 154,325.80 is: 212,978.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,145.76 : 379,716.96 = 154,325.80 : x
  2. Step 2: Convert to fraction form
    275,145.76/379,716.96 = 154,325.80/x
  3. Step 3: Cross multiply
    275,145.76x = 379,716.96 × 154,325.80
  4. Step 4: Simplify right side
    275,145.76x = 58,600,123,625.57
  5. Step 5: Solve for x
    x = 58,600,123,625.57/275,145.76
  6. Step 6: Final answer
    x = 212,978.47

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1.5x scale

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.