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Finding the Fourth Proportional to 321,910.40, 482,865.60 and 238,966.40

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Solution

The fourth proportional to 321,910.40, 482,865.60 and 238,966.40 is: 358,449.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,910.40 : 482,865.60 = 238,966.40 : x
  2. Step 2: Convert to fraction form
    321,910.40/482,865.60 = 238,966.40/x
  3. Step 3: Cross multiply
    321,910.40x = 482,865.60 × 238,966.40
  4. Step 4: Simplify right side
    321,910.40x = 115,388,654,115.84
  5. Step 5: Solve for x
    x = 115,388,654,115.84/321,910.40
  6. Step 6: Final answer
    x = 358,449.60

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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.