Home / 378,929.34-522,921.42-209,162.25

Finding the Fourth Proportional to 378,929.34, 522,921.42 and 209,162.25

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Solution

The fourth proportional to 378,929.34, 522,921.42 and 209,162.25 is: 288,643.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,929.34 : 522,921.42 = 209,162.25 : x
  2. Step 2: Convert to fraction form
    378,929.34/522,921.42 = 209,162.25/x
  3. Step 3: Cross multiply
    378,929.34x = 522,921.42 × 209,162.25
  4. Step 4: Simplify right side
    378,929.34x = 109,375,420,780.40
  5. Step 5: Solve for x
    x = 109,375,420,780.40/378,929.34
  6. Step 6: Final answer
    x = 288,643.31

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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.