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Finding the Fourth Proportional to 714,917.75, 986,603.67 and 392,634.81

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Solution

The fourth proportional to 714,917.75, 986,603.67 and 392,634.81 is: 541,845.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,917.75 : 986,603.67 = 392,634.81 : x
  2. Step 2: Convert to fraction form
    714,917.75/986,603.67 = 392,634.81/x
  3. Step 3: Cross multiply
    714,917.75x = 986,603.67 × 392,634.81
  4. Step 4: Simplify right side
    714,917.75x = 387,374,944,515.75
  5. Step 5: Solve for x
    x = 387,374,944,515.75/714,917.75
  6. Step 6: Final answer
    x = 541,845.47

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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.