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Finding the Fourth Proportional to 439,193.77, 655,098.79 and 398,831.31

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Solution

The fourth proportional to 439,193.77, 655,098.79 and 398,831.31 is: 594,894.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,193.77 : 655,098.79 = 398,831.31 : x
  2. Step 2: Convert to fraction form
    439,193.77/655,098.79 = 398,831.31/x
  3. Step 3: Cross multiply
    439,193.77x = 655,098.79 × 398,831.31
  4. Step 4: Simplify right side
    439,193.77x = 261,273,911,550.27
  5. Step 5: Solve for x
    x = 261,273,911,550.27/439,193.77
  6. Step 6: Final answer
    x = 594,894.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.