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Finding the Fourth Proportional to 276,145.77, 381,078.78 and 155,284.49

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Solution

The fourth proportional to 276,145.77, 381,078.78 and 155,284.49 is: 214,291.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,145.77 : 381,078.78 = 155,284.49 : x
  2. Step 2: Convert to fraction form
    276,145.77/381,078.78 = 155,284.49/x
  3. Step 3: Cross multiply
    276,145.77x = 381,078.78 × 155,284.49
  4. Step 4: Simplify right side
    276,145.77x = 59,175,624,372.50
  5. Step 5: Solve for x
    x = 59,175,624,372.50/276,145.77
  6. Step 6: Final answer
    x = 214,291.25

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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.