Home / 378,911.25-522,897.57-209,145.42

Finding the Fourth Proportional to 378,911.25, 522,897.57 and 209,145.42

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Solution

The fourth proportional to 378,911.25, 522,897.57 and 209,145.42 is: 288,620.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,911.25 : 522,897.57 = 209,145.42 : x
  2. Step 2: Convert to fraction form
    378,911.25/522,897.57 = 209,145.42/x
  3. Step 3: Cross multiply
    378,911.25x = 522,897.57 × 209,145.42
  4. Step 4: Simplify right side
    378,911.25x = 109,361,631,894.63
  5. Step 5: Solve for x
    x = 109,361,631,894.63/378,911.25
  6. Step 6: Final answer
    x = 288,620.70

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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.