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Finding the Fourth Proportional to 205,451.30, 307,658.55 and 163,979.30

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Solution

The fourth proportional to 205,451.30, 307,658.55 and 163,979.30 is: 245,555.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,451.30 : 307,658.55 = 163,979.30 : x
  2. Step 2: Convert to fraction form
    205,451.30/307,658.55 = 163,979.30/x
  3. Step 3: Cross multiply
    205,451.30x = 307,658.55 × 163,979.30
  4. Step 4: Simplify right side
    205,451.30x = 50,449,633,668.02
  5. Step 5: Solve for x
    x = 50,449,633,668.02/205,451.30
  6. Step 6: Final answer
    x = 245,555.19

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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.