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Finding the Fourth Proportional to 386,310.14, 579,624.63 and 208,607.88

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Solution

The fourth proportional to 386,310.14, 579,624.63 and 208,607.88 is: 312,997.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,310.14 : 579,624.63 = 208,607.88 : x
  2. Step 2: Convert to fraction form
    386,310.14/579,624.63 = 208,607.88/x
  3. Step 3: Cross multiply
    386,310.14x = 579,624.63 × 208,607.88
  4. Step 4: Simplify right side
    386,310.14x = 120,914,265,260.08
  5. Step 5: Solve for x
    x = 120,914,265,260.08/386,310.14
  6. Step 6: Final answer
    x = 312,997.91

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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.