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Finding the Fourth Proportional to 276,554.55, 381,628.95 and 155,691

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Solution

The fourth proportional to 276,554.55, 381,628.95 and 155,691 is: 214,844.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,554.55 : 381,628.95 = 155,691 : x
  2. Step 2: Convert to fraction form
    276,554.55/381,628.95 = 155,691/x
  3. Step 3: Cross multiply
    276,554.55x = 381,628.95 × 155,691
  4. Step 4: Simplify right side
    276,554.55x = 59,416,192,854.45
  5. Step 5: Solve for x
    x = 59,416,192,854.45/276,554.55
  6. Step 6: Final answer
    x = 214,844.39

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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.