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Finding the Fourth Proportional to 663,379.40, 993,974.70 and 382,406.60

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Solution

The fourth proportional to 663,379.40, 993,974.70 and 382,406.60 is: 572,979.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,379.40 : 993,974.70 = 382,406.60 : x
  2. Step 2: Convert to fraction form
    663,379.40/993,974.70 = 382,406.60/x
  3. Step 3: Cross multiply
    663,379.40x = 993,974.70 × 382,406.60
  4. Step 4: Simplify right side
    663,379.40x = 380,102,485,513.02
  5. Step 5: Solve for x
    x = 380,102,485,513.02/663,379.40
  6. Step 6: Final answer
    x = 572,979.03

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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.