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Finding the Fourth Proportional to 323,029.58, 484,506.21 and 86,390.60

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Solution

The fourth proportional to 323,029.58, 484,506.21 and 86,390.60 is: 129,575.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,029.58 : 484,506.21 = 86,390.60 : x
  2. Step 2: Convert to fraction form
    323,029.58/484,506.21 = 86,390.60/x
  3. Step 3: Cross multiply
    323,029.58x = 484,506.21 × 86,390.60
  4. Step 4: Simplify right side
    323,029.58x = 41,856,782,185.63
  5. Step 5: Solve for x
    x = 41,856,782,185.63/323,029.58
  6. Step 6: Final answer
    x = 129,575.69

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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.