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Finding the Fourth Proportional to 276,392.49, 381,417.17 and 155,533.71

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Solution

The fourth proportional to 276,392.49, 381,417.17 and 155,533.71 is: 214,634.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,392.49 : 381,417.17 = 155,533.71 : x
  2. Step 2: Convert to fraction form
    276,392.49/381,417.17 = 155,533.71/x
  3. Step 3: Cross multiply
    276,392.49x = 381,417.17 × 155,533.71
  4. Step 4: Simplify right side
    276,392.49x = 59,323,227,507.80
  5. Step 5: Solve for x
    x = 59,323,227,507.80/276,392.49
  6. Step 6: Final answer
    x = 214,634.01

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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.