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Finding the Fourth Proportional to 276,804.72, 381,911.50 and 155,903.76

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Solution

The fourth proportional to 276,804.72, 381,911.50 and 155,903.76 is: 215,102.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,804.72 : 381,911.50 = 155,903.76 : x
  2. Step 2: Convert to fraction form
    276,804.72/381,911.50 = 155,903.76/x
  3. Step 3: Cross multiply
    276,804.72x = 381,911.50 × 155,903.76
  4. Step 4: Simplify right side
    276,804.72x = 59,541,438,837.24
  5. Step 5: Solve for x
    x = 59,541,438,837.24/276,804.72
  6. Step 6: Final answer
    x = 215,102.69

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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.