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Finding the Fourth Proportional to 276,392.47, 381,420.39 and 155,535.77

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Solution

The fourth proportional to 276,392.47, 381,420.39 and 155,535.77 is: 214,638.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,392.47 : 381,420.39 = 155,535.77 : x
  2. Step 2: Convert to fraction form
    276,392.47/381,420.39 = 155,535.77/x
  3. Step 3: Cross multiply
    276,392.47x = 381,420.39 × 155,535.77
  4. Step 4: Simplify right side
    276,392.47x = 59,324,514,052.35
  5. Step 5: Solve for x
    x = 59,324,514,052.35/276,392.47
  6. Step 6: Final answer
    x = 214,638.68

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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.