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Finding the Fourth Proportional to 316,979.70, 475,469.55 and 205,005.30

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Solution

The fourth proportional to 316,979.70, 475,469.55 and 205,005.30 is: 307,507.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,979.70 : 475,469.55 = 205,005.30 : x
  2. Step 2: Convert to fraction form
    316,979.70/475,469.55 = 205,005.30/x
  3. Step 3: Cross multiply
    316,979.70x = 475,469.55 × 205,005.30
  4. Step 4: Simplify right side
    316,979.70x = 97,473,777,738.62
  5. Step 5: Solve for x
    x = 97,473,777,738.62/316,979.70
  6. Step 6: Final answer
    x = 307,507.95

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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.