Home / 378,890.41-522,831.54-209,113.60

Finding the Fourth Proportional to 378,890.41, 522,831.54 and 209,113.60

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Solution

The fourth proportional to 378,890.41, 522,831.54 and 209,113.60 is: 288,556.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,890.41 : 522,831.54 = 209,113.60 : x
  2. Step 2: Convert to fraction form
    378,890.41/522,831.54 = 209,113.60/x
  3. Step 3: Cross multiply
    378,890.41x = 522,831.54 × 209,113.60
  4. Step 4: Simplify right side
    378,890.41x = 109,331,185,522.94
  5. Step 5: Solve for x
    x = 109,331,185,522.94/378,890.41
  6. Step 6: Final answer
    x = 288,556.22

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1.5x scale

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.