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Finding the Fourth Proportional to 442,979.76, 611,099.31 and 289,950.51

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Solution

The fourth proportional to 442,979.76, 611,099.31 and 289,950.51 is: 399,992.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,979.76 : 611,099.31 = 289,950.51 : x
  2. Step 2: Convert to fraction form
    442,979.76/611,099.31 = 289,950.51/x
  3. Step 3: Cross multiply
    442,979.76x = 611,099.31 × 289,950.51
  4. Step 4: Simplify right side
    442,979.76x = 177,188,556,595.15
  5. Step 5: Solve for x
    x = 177,188,556,595.15/442,979.76
  6. Step 6: Final answer
    x = 399,992.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.