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Finding the Fourth Proportional to 276,367.71, 381,394.88 and 155,513.28

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Solution

The fourth proportional to 276,367.71, 381,394.88 and 155,513.28 is: 214,612.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,367.71 : 381,394.88 = 155,513.28 : x
  2. Step 2: Convert to fraction form
    276,367.71/381,394.88 = 155,513.28/x
  3. Step 3: Cross multiply
    276,367.71x = 381,394.88 × 155,513.28
  4. Step 4: Simplify right side
    276,367.71x = 59,311,967,986.44
  5. Step 5: Solve for x
    x = 59,311,967,986.44/276,367.71
  6. Step 6: Final answer
    x = 214,612.51

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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.