Home / 378,886.48-522,860.80-209,120.56

Finding the Fourth Proportional to 378,886.48, 522,860.80 and 209,120.56

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Solution

The fourth proportional to 378,886.48, 522,860.80 and 209,120.56 is: 288,584.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,886.48 : 522,860.80 = 209,120.56 : x
  2. Step 2: Convert to fraction form
    378,886.48/522,860.80 = 209,120.56/x
  3. Step 3: Cross multiply
    378,886.48x = 522,860.80 × 209,120.56
  4. Step 4: Simplify right side
    378,886.48x = 109,340,943,298.05
  5. Step 5: Solve for x
    x = 109,340,943,298.05/378,886.48
  6. Step 6: Final answer
    x = 288,584.97

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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.