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Finding the Fourth Proportional to 378,518.58, 522,333.09 and 217,399.86

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Solution

The fourth proportional to 378,518.58, 522,333.09 and 217,399.86 is: 299,998.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,518.58 : 522,333.09 = 217,399.86 : x
  2. Step 2: Convert to fraction form
    378,518.58/522,333.09 = 217,399.86/x
  3. Step 3: Cross multiply
    378,518.58x = 522,333.09 × 217,399.86
  4. Step 4: Simplify right side
    378,518.58x = 113,555,140,639.37
  5. Step 5: Solve for x
    x = 113,555,140,639.37/378,518.58
  6. Step 6: Final answer
    x = 299,998.86

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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.