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Finding the Fourth Proportional to 276,402.88, 381,455.34 and 155,555.80

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Solution

The fourth proportional to 276,402.88, 381,455.34 and 155,555.80 is: 214,677.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,402.88 : 381,455.34 = 155,555.80 : x
  2. Step 2: Convert to fraction form
    276,402.88/381,455.34 = 155,555.80/x
  3. Step 3: Cross multiply
    276,402.88x = 381,455.34 × 155,555.80
  4. Step 4: Simplify right side
    276,402.88x = 59,337,590,577.97
  5. Step 5: Solve for x
    x = 59,337,590,577.97/276,402.88
  6. Step 6: Final answer
    x = 214,677.90

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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.