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Finding the Fourth Proportional to 315,628.25, 435,566.97 and 172,388.63

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Solution

The fourth proportional to 315,628.25, 435,566.97 and 172,388.63 is: 237,896.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,628.25 : 435,566.97 = 172,388.63 : x
  2. Step 2: Convert to fraction form
    315,628.25/435,566.97 = 172,388.63/x
  3. Step 3: Cross multiply
    315,628.25x = 435,566.97 × 172,388.63
  4. Step 4: Simplify right side
    315,628.25x = 75,086,794,320.47
  5. Step 5: Solve for x
    x = 75,086,794,320.47/315,628.25
  6. Step 6: Final answer
    x = 237,896.31

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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.