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Finding the Fourth Proportional to 276,187.66, 381,135.34 and 155,328.90

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Solution

The fourth proportional to 276,187.66, 381,135.34 and 155,328.90 is: 214,351.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,187.66 : 381,135.34 = 155,328.90 : x
  2. Step 2: Convert to fraction form
    276,187.66/381,135.34 = 155,328.90/x
  3. Step 3: Cross multiply
    276,187.66x = 381,135.34 × 155,328.90
  4. Step 4: Simplify right side
    276,187.66x = 59,201,333,113.33
  5. Step 5: Solve for x
    x = 59,201,333,113.33/276,187.66
  6. Step 6: Final answer
    x = 214,351.84

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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.