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Finding the Fourth Proportional to 387,746.91, 535,049.82 and 215,636.94

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Solution

The fourth proportional to 387,746.91, 535,049.82 and 215,636.94 is: 297,556.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,746.91 : 535,049.82 = 215,636.94 : x
  2. Step 2: Convert to fraction form
    387,746.91/535,049.82 = 215,636.94/x
  3. Step 3: Cross multiply
    387,746.91x = 535,049.82 × 215,636.94
  4. Step 4: Simplify right side
    387,746.91x = 115,376,505,932.35
  5. Step 5: Solve for x
    x = 115,376,505,932.35/387,746.91
  6. Step 6: Final answer
    x = 297,556.22

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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.