Home / 378,621.72-521,434.94-370,354.86

Finding the Fourth Proportional to 378,621.72, 521,434.94 and 370,354.86

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Solution

The fourth proportional to 378,621.72, 521,434.94 and 370,354.86 is: 510,049.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,621.72 : 521,434.94 = 370,354.86 : x
  2. Step 2: Convert to fraction form
    378,621.72/521,434.94 = 370,354.86/x
  3. Step 3: Cross multiply
    378,621.72x = 521,434.94 × 370,354.86
  4. Step 4: Simplify right side
    378,621.72x = 193,115,962,351.03
  5. Step 5: Solve for x
    x = 193,115,962,351.03/378,621.72
  6. Step 6: Final answer
    x = 510,049.88

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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.