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Finding the Fourth Proportional to 387,797.63, 535,167.41 and 215,729.33

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Solution

The fourth proportional to 387,797.63, 535,167.41 and 215,729.33 is: 297,710.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,797.63 : 535,167.41 = 215,729.33 : x
  2. Step 2: Convert to fraction form
    387,797.63/535,167.41 = 215,729.33/x
  3. Step 3: Cross multiply
    387,797.63x = 535,167.41 × 215,729.33
  4. Step 4: Simplify right side
    387,797.63x = 115,451,303,042.65
  5. Step 5: Solve for x
    x = 115,451,303,042.65/387,797.63
  6. Step 6: Final answer
    x = 297,710.19

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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.