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Finding the Fourth Proportional to 276,664.80, 381,792.40 and 155,805.60

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Solution

The fourth proportional to 276,664.80, 381,792.40 and 155,805.60 is: 215,008.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,664.80 : 381,792.40 = 155,805.60 : x
  2. Step 2: Convert to fraction form
    276,664.80/381,792.40 = 155,805.60/x
  3. Step 3: Cross multiply
    276,664.80x = 381,792.40 × 155,805.60
  4. Step 4: Simplify right side
    276,664.80x = 59,485,393,957.44
  5. Step 5: Solve for x
    x = 59,485,393,957.44/276,664.80
  6. Step 6: Final answer
    x = 215,008.90

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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.