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Finding the Fourth Proportional to 276,172.37, 381,132.95 and 155,320.80

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Solution

The fourth proportional to 276,172.37, 381,132.95 and 155,320.80 is: 214,351.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,172.37 : 381,132.95 = 155,320.80 : x
  2. Step 2: Convert to fraction form
    276,172.37/381,132.95 = 155,320.80/x
  3. Step 3: Cross multiply
    276,172.37x = 381,132.95 × 155,320.80
  4. Step 4: Simplify right side
    276,172.37x = 59,197,876,157.24
  5. Step 5: Solve for x
    x = 59,197,876,157.24/276,172.37
  6. Step 6: Final answer
    x = 214,351.19

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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.