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Finding the Fourth Proportional to 381,368.52, 571,927.20 and 128,580.72

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Solution

The fourth proportional to 381,368.52, 571,927.20 and 128,580.72 is: 192,828.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,368.52 : 571,927.20 = 128,580.72 : x
  2. Step 2: Convert to fraction form
    381,368.52/571,927.20 = 128,580.72/x
  3. Step 3: Cross multiply
    381,368.52x = 571,927.20 × 128,580.72
  4. Step 4: Simplify right side
    381,368.52x = 73,538,811,163.58
  5. Step 5: Solve for x
    x = 73,538,811,163.58/381,368.52
  6. Step 6: Final answer
    x = 192,828.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.