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Finding the Fourth Proportional to 276,790.80, 415,164.60 and 108,278.40

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Solution

The fourth proportional to 276,790.80, 415,164.60 and 108,278.40 is: 162,409.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,790.80 : 415,164.60 = 108,278.40 : x
  2. Step 2: Convert to fraction form
    276,790.80/415,164.60 = 108,278.40/x
  3. Step 3: Cross multiply
    276,790.80x = 415,164.60 × 108,278.40
  4. Step 4: Simplify right side
    276,790.80x = 44,953,358,624.64
  5. Step 5: Solve for x
    x = 44,953,358,624.64/276,790.80
  6. Step 6: Final answer
    x = 162,409.15

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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.