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Finding the Fourth Proportional to 276,391.47, 381,419.01 and 155,534.77

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Solution

The fourth proportional to 276,391.47, 381,419.01 and 155,534.77 is: 214,637.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,391.47 : 381,419.01 = 155,534.77 : x
  2. Step 2: Convert to fraction form
    276,391.47/381,419.01 = 155,534.77/x
  3. Step 3: Cross multiply
    276,391.47x = 381,419.01 × 155,534.77
  4. Step 4: Simplify right side
    276,391.47x = 59,323,917,606.30
  5. Step 5: Solve for x
    x = 59,323,917,606.30/276,391.47
  6. Step 6: Final answer
    x = 214,637.30

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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.