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Finding the Fourth Proportional to 276,912.80, 382,141.16 and 156,055.96

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Solution

The fourth proportional to 276,912.80, 382,141.16 and 156,055.96 is: 215,358.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,912.80 : 382,141.16 = 156,055.96 : x
  2. Step 2: Convert to fraction form
    276,912.80/382,141.16 = 156,055.96/x
  3. Step 3: Cross multiply
    276,912.80x = 382,141.16 × 156,055.96
  4. Step 4: Simplify right side
    276,912.80x = 59,635,405,579.31
  5. Step 5: Solve for x
    x = 59,635,405,579.31/276,912.80
  6. Step 6: Final answer
    x = 215,358.07

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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.