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Finding the Fourth Proportional to 483,121.40, 721,428.71 and 394,550.60

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Solution

The fourth proportional to 483,121.40, 721,428.71 and 394,550.60 is: 589,168.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,121.40 : 721,428.71 = 394,550.60 : x
  2. Step 2: Convert to fraction form
    483,121.40/721,428.71 = 394,550.60/x
  3. Step 3: Cross multiply
    483,121.40x = 721,428.71 × 394,550.60
  4. Step 4: Simplify right side
    483,121.40x = 284,640,124,807.83
  5. Step 5: Solve for x
    x = 284,640,124,807.83/483,121.40
  6. Step 6: Final answer
    x = 589,168.95

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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.