Home / 378,879.12-522,852.06-209,112

Finding the Fourth Proportional to 378,879.12, 522,852.06 and 209,112

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Solution

The fourth proportional to 378,879.12, 522,852.06 and 209,112 is: 288,573.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,879.12 : 522,852.06 = 209,112 : x
  2. Step 2: Convert to fraction form
    378,879.12/522,852.06 = 209,112/x
  3. Step 3: Cross multiply
    378,879.12x = 522,852.06 × 209,112
  4. Step 4: Simplify right side
    378,879.12x = 109,334,639,970.72
  5. Step 5: Solve for x
    x = 109,334,639,970.72/378,879.12
  6. Step 6: Final answer
    x = 288,573.94

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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.