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Finding the Fourth Proportional to 667,617.03, 996,569.15 and 618,278.31

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Solution

The fourth proportional to 667,617.03, 996,569.15 and 618,278.31 is: 922,919.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,617.03 : 996,569.15 = 618,278.31 : x
  2. Step 2: Convert to fraction form
    667,617.03/996,569.15 = 618,278.31/x
  3. Step 3: Cross multiply
    667,617.03x = 996,569.15 × 618,278.31
  4. Step 4: Simplify right side
    667,617.03x = 616,157,086,768.75
  5. Step 5: Solve for x
    x = 616,157,086,768.75/667,617.03
  6. Step 6: Final answer
    x = 922,919.97

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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.