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Finding the Fourth Proportional to 321,920.37, 482,690.88 and 122,254.83

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Solution

The fourth proportional to 321,920.37, 482,690.88 and 122,254.83 is: 183,310.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,920.37 : 482,690.88 = 122,254.83 : x
  2. Step 2: Convert to fraction form
    321,920.37/482,690.88 = 122,254.83/x
  3. Step 3: Cross multiply
    321,920.37x = 482,690.88 × 122,254.83
  4. Step 4: Simplify right side
    321,920.37x = 59,011,291,476.95
  5. Step 5: Solve for x
    x = 59,011,291,476.95/321,920.37
  6. Step 6: Final answer
    x = 183,310.21

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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.