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Finding the Fourth Proportional to 321,427.95, 482,103.05 and 84,789.69

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Solution

The fourth proportional to 321,427.95, 482,103.05 and 84,789.69 is: 127,174.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,427.95 : 482,103.05 = 84,789.69 : x
  2. Step 2: Convert to fraction form
    321,427.95/482,103.05 = 84,789.69/x
  3. Step 3: Cross multiply
    321,427.95x = 482,103.05 × 84,789.69
  4. Step 4: Simplify right side
    321,427.95x = 40,877,367,733.61
  5. Step 5: Solve for x
    x = 40,877,367,733.61/321,427.95
  6. Step 6: Final answer
    x = 127,174.28

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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.