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Finding the Fourth Proportional to 276,636.57, 381,754.70 and 155,779.30

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Solution

The fourth proportional to 276,636.57, 381,754.70 and 155,779.30 is: 214,973.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,636.57 : 381,754.70 = 155,779.30 : x
  2. Step 2: Convert to fraction form
    276,636.57/381,754.70 = 155,779.30/x
  3. Step 3: Cross multiply
    276,636.57x = 381,754.70 × 155,779.30
  4. Step 4: Simplify right side
    276,636.57x = 59,469,479,158.81
  5. Step 5: Solve for x
    x = 59,469,479,158.81/276,636.57
  6. Step 6: Final answer
    x = 214,973.31

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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.