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Finding the Fourth Proportional to 276,411.60, 381,443.40 and 155,552.85

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Solution

The fourth proportional to 276,411.60, 381,443.40 and 155,552.85 is: 214,660.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,411.60 : 381,443.40 = 155,552.85 : x
  2. Step 2: Convert to fraction form
    276,411.60/381,443.40 = 155,552.85/x
  3. Step 3: Cross multiply
    276,411.60x = 381,443.40 × 155,552.85
  4. Step 4: Simplify right side
    276,411.60x = 59,334,607,983.69
  5. Step 5: Solve for x
    x = 59,334,607,983.69/276,411.60
  6. Step 6: Final answer
    x = 214,660.34

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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.