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Finding the Fourth Proportional to 276,783.61, 381,959.67 and 155,963.83

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Solution

The fourth proportional to 276,783.61, 381,959.67 and 155,963.83 is: 215,229.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,783.61 : 381,959.67 = 155,963.83 : x
  2. Step 2: Convert to fraction form
    276,783.61/381,959.67 = 155,963.83/x
  3. Step 3: Cross multiply
    276,783.61x = 381,959.67 × 155,963.83
  4. Step 4: Simplify right side
    276,783.61x = 59,571,893,038.74
  5. Step 5: Solve for x
    x = 59,571,893,038.74/276,783.61
  6. Step 6: Final answer
    x = 215,229.12

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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.