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Finding the Fourth Proportional to 378,055.26, 521,791.59 and 217,019.10

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Solution

The fourth proportional to 378,055.26, 521,791.59 and 217,019.10 is: 299,529.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,055.26 : 521,791.59 = 217,019.10 : x
  2. Step 2: Convert to fraction form
    378,055.26/521,791.59 = 217,019.10/x
  3. Step 3: Cross multiply
    378,055.26x = 521,791.59 × 217,019.10
  4. Step 4: Simplify right side
    378,055.26x = 113,238,741,249.37
  5. Step 5: Solve for x
    x = 113,238,741,249.37/378,055.26
  6. Step 6: Final answer
    x = 299,529.60

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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.