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Finding the Fourth Proportional to 321,919.11, 482,689.13 and 122,253.71

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Solution

The fourth proportional to 321,919.11, 482,689.13 and 122,253.71 is: 183,308.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,919.11 : 482,689.13 = 122,253.71 : x
  2. Step 2: Convert to fraction form
    321,919.11/482,689.13 = 122,253.71/x
  3. Step 3: Cross multiply
    321,919.11x = 482,689.13 × 122,253.71
  4. Step 4: Simplify right side
    321,919.11x = 59,010,533,894.46
  5. Step 5: Solve for x
    x = 59,010,533,894.46/321,919.11
  6. Step 6: Final answer
    x = 183,308.58

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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.