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Finding the Fourth Proportional to 276,330.80, 381,305.58 and 155,513.63

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Solution

The fourth proportional to 276,330.80, 381,305.58 and 155,513.63 is: 214,591.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,330.80 : 381,305.58 = 155,513.63 : x
  2. Step 2: Convert to fraction form
    276,330.80/381,305.58 = 155,513.63/x
  3. Step 3: Cross multiply
    276,330.80x = 381,305.58 × 155,513.63
  4. Step 4: Simplify right side
    276,330.80x = 59,298,212,978.53
  5. Step 5: Solve for x
    x = 59,298,212,978.53/276,330.80
  6. Step 6: Final answer
    x = 214,591.40

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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.