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Finding the Fourth Proportional to 276,438.66, 381,484.95 and 155,580.78

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Solution

The fourth proportional to 276,438.66, 381,484.95 and 155,580.78 is: 214,701.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,438.66 : 381,484.95 = 155,580.78 : x
  2. Step 2: Convert to fraction form
    276,438.66/381,484.95 = 155,580.78/x
  3. Step 3: Cross multiply
    276,438.66x = 381,484.95 × 155,580.78
  4. Step 4: Simplify right side
    276,438.66x = 59,351,726,079.26
  5. Step 5: Solve for x
    x = 59,351,726,079.26/276,438.66
  6. Step 6: Final answer
    x = 214,701.25

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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.