Home / 387,138.30-534,336.24-215,115.37

Finding the Fourth Proportional to 387,138.30, 534,336.24 and 215,115.37

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Solution

The fourth proportional to 387,138.30, 534,336.24 and 215,115.37 is: 296,906.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,138.30 : 534,336.24 = 215,115.37 : x
  2. Step 2: Convert to fraction form
    387,138.30/534,336.24 = 215,115.37/x
  3. Step 3: Cross multiply
    387,138.30x = 534,336.24 × 215,115.37
  4. Step 4: Simplify right side
    387,138.30x = 114,943,937,972.01
  5. Step 5: Solve for x
    x = 114,943,937,972.01/387,138.30
  6. Step 6: Final answer
    x = 296,906.66

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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.