Home / 642,939.15-963,183.87-399,394.83

Finding the Fourth Proportional to 642,939.15, 963,183.87 and 399,394.83

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Solution

The fourth proportional to 642,939.15, 963,183.87 and 399,394.83 is: 598,331.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,939.15 : 963,183.87 = 399,394.83 : x
  2. Step 2: Convert to fraction form
    642,939.15/963,183.87 = 399,394.83/x
  3. Step 3: Cross multiply
    642,939.15x = 963,183.87 × 399,394.83
  4. Step 4: Simplify right side
    642,939.15x = 384,690,658,017.39
  5. Step 5: Solve for x
    x = 384,690,658,017.39/642,939.15
  6. Step 6: Final answer
    x = 598,331.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.