Home / 387,786.15-535,177.19-215,736.52

Finding the Fourth Proportional to 387,786.15, 535,177.19 and 215,736.52

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Solution

The fourth proportional to 387,786.15, 535,177.19 and 215,736.52 is: 297,734.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,786.15 : 535,177.19 = 215,736.52 : x
  2. Step 2: Convert to fraction form
    387,786.15/535,177.19 = 215,736.52/x
  3. Step 3: Cross multiply
    387,786.15x = 535,177.19 × 215,736.52
  4. Step 4: Simplify right side
    387,786.15x = 115,457,264,553.98
  5. Step 5: Solve for x
    x = 115,457,264,553.98/387,786.15
  6. Step 6: Final answer
    x = 297,734.37

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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.