Home / 378,928.32-522,921.52-209,162.44

Finding the Fourth Proportional to 378,928.32, 522,921.52 and 209,162.44

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Solution

The fourth proportional to 378,928.32, 522,921.52 and 209,162.44 is: 288,644.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,928.32 : 522,921.52 = 209,162.44 : x
  2. Step 2: Convert to fraction form
    378,928.32/522,921.52 = 209,162.44/x
  3. Step 3: Cross multiply
    378,928.32x = 522,921.52 × 209,162.44
  4. Step 4: Simplify right side
    378,928.32x = 109,375,541,051.71
  5. Step 5: Solve for x
    x = 109,375,541,051.71/378,928.32
  6. Step 6: Final answer
    x = 288,644.41

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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.