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Finding the Fourth Proportional to 667,618.78, 996,571.76 and 618,280.06

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Solution

The fourth proportional to 667,618.78, 996,571.76 and 618,280.06 is: 922,922.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,618.78 : 996,571.76 = 618,280.06 : x
  2. Step 2: Convert to fraction form
    667,618.78/996,571.76 = 618,280.06/x
  3. Step 3: Cross multiply
    667,618.78x = 996,571.76 × 618,280.06
  4. Step 4: Simplify right side
    667,618.78x = 616,160,447,567.11
  5. Step 5: Solve for x
    x = 616,160,447,567.11/667,618.78
  6. Step 6: Final answer
    x = 922,922.58

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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.