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Finding the Fourth Proportional to 276,625.64, 381,779.72 and 155,790.54

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Solution

The fourth proportional to 276,625.64, 381,779.72 and 155,790.54 is: 215,011.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,625.64 : 381,779.72 = 155,790.54 : x
  2. Step 2: Convert to fraction form
    276,625.64/381,779.72 = 155,790.54/x
  3. Step 3: Cross multiply
    276,625.64x = 381,779.72 × 155,790.54
  4. Step 4: Simplify right side
    276,625.64x = 59,477,667,960.90
  5. Step 5: Solve for x
    x = 59,477,667,960.90/276,625.64
  6. Step 6: Final answer
    x = 215,011.41

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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.