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Finding the Fourth Proportional to 276,317.88, 381,289.86 and 155,448.90

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Solution

The fourth proportional to 276,317.88, 381,289.86 and 155,448.90 is: 214,503.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,317.88 : 381,289.86 = 155,448.90 : x
  2. Step 2: Convert to fraction form
    276,317.88/381,289.86 = 155,448.90/x
  3. Step 3: Cross multiply
    276,317.88x = 381,289.86 × 155,448.90
  4. Step 4: Simplify right side
    276,317.88x = 59,271,089,318.15
  5. Step 5: Solve for x
    x = 59,271,089,318.15/276,317.88
  6. Step 6: Final answer
    x = 214,503.27

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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.