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Finding the Fourth Proportional to 667,618.91, 996,571.94 and 618,280.19

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Solution

The fourth proportional to 667,618.91, 996,571.94 and 618,280.19 is: 922,922.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,618.91 : 996,571.94 = 618,280.19 : x
  2. Step 2: Convert to fraction form
    667,618.91/996,571.94 = 618,280.19/x
  3. Step 3: Cross multiply
    667,618.91x = 996,571.94 × 618,280.19
  4. Step 4: Simplify right side
    667,618.91x = 616,160,684,974.71
  5. Step 5: Solve for x
    x = 616,160,684,974.71/667,618.91
  6. Step 6: Final answer
    x = 922,922.76

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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.