Home / 378,965.04-522,971.20-209,198.72

Finding the Fourth Proportional to 378,965.04, 522,971.20 and 209,198.72

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Solution

The fourth proportional to 378,965.04, 522,971.20 and 209,198.72 is: 288,693.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,965.04 : 522,971.20 = 209,198.72 : x
  2. Step 2: Convert to fraction form
    378,965.04/522,971.20 = 209,198.72/x
  3. Step 3: Cross multiply
    378,965.04x = 522,971.20 × 209,198.72
  4. Step 4: Simplify right side
    378,965.04x = 109,404,905,636.86
  5. Step 5: Solve for x
    x = 109,404,905,636.86/378,965.04
  6. Step 6: Final answer
    x = 288,693.93

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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.