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Finding the Fourth Proportional to 408,789.99, 613,267.00 and 142,479

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Solution

The fourth proportional to 408,789.99, 613,267.00 and 142,479 is: 213,747.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,789.99 : 613,267.00 = 142,479 : x
  2. Step 2: Convert to fraction form
    408,789.99/613,267.00 = 142,479/x
  3. Step 3: Cross multiply
    408,789.99x = 613,267.00 × 142,479
  4. Step 4: Simplify right side
    408,789.99x = 87,377,668,536.80
  5. Step 5: Solve for x
    x = 87,377,668,536.80/408,789.99
  6. Step 6: Final answer
    x = 213,747.08

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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.