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Finding the Fourth Proportional to 352,992.78, 487,171.40 and 209,752.79

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Solution

The fourth proportional to 352,992.78, 487,171.40 and 209,752.79 is: 289,483.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,992.78 : 487,171.40 = 209,752.79 : x
  2. Step 2: Convert to fraction form
    352,992.78/487,171.40 = 209,752.79/x
  3. Step 3: Cross multiply
    352,992.78x = 487,171.40 × 209,752.79
  4. Step 4: Simplify right side
    352,992.78x = 102,185,556,873.59
  5. Step 5: Solve for x
    x = 102,185,556,873.59/352,992.78
  6. Step 6: Final answer
    x = 289,483.42

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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.