Home / 378,890.66-522,831.89-209,113.85

Finding the Fourth Proportional to 378,890.66, 522,831.89 and 209,113.85

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Solution

The fourth proportional to 378,890.66, 522,831.89 and 209,113.85 is: 288,556.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,890.66 : 522,831.89 = 209,113.85 : x
  2. Step 2: Convert to fraction form
    378,890.66/522,831.89 = 209,113.85/x
  3. Step 3: Cross multiply
    378,890.66x = 522,831.89 × 209,113.85
  4. Step 4: Simplify right side
    378,890.66x = 109,331,388,375.11
  5. Step 5: Solve for x
    x = 109,331,388,375.11/378,890.66
  6. Step 6: Final answer
    x = 288,556.57

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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.