Home / 387,138.95-534,236.89-215,067.73

Finding the Fourth Proportional to 387,138.95, 534,236.89 and 215,067.73

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Solution

The fourth proportional to 387,138.95, 534,236.89 and 215,067.73 is: 296,785.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,138.95 : 534,236.89 = 215,067.73 : x
  2. Step 2: Convert to fraction form
    387,138.95/534,236.89 = 215,067.73/x
  3. Step 3: Cross multiply
    387,138.95x = 534,236.89 × 215,067.73
  4. Step 4: Simplify right side
    387,138.95x = 114,897,115,214.56
  5. Step 5: Solve for x
    x = 114,897,115,214.56/387,138.95
  6. Step 6: Final answer
    x = 296,785.22

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1.5x scale

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.