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Finding the Fourth Proportional to 663,605.33, 915,735.89 and 377,085.65

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Solution

The fourth proportional to 663,605.33, 915,735.89 and 377,085.65 is: 520,355.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,605.33 : 915,735.89 = 377,085.65 : x
  2. Step 2: Convert to fraction form
    663,605.33/915,735.89 = 377,085.65/x
  3. Step 3: Cross multiply
    663,605.33x = 915,735.89 × 377,085.65
  4. Step 4: Simplify right side
    663,605.33x = 345,310,858,730.30
  5. Step 5: Solve for x
    x = 345,310,858,730.30/663,605.33
  6. Step 6: Final answer
    x = 520,355.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.