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Finding the Fourth Proportional to 663,627.57, 915,806.94 and 361,821.57

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Solution

The fourth proportional to 663,627.57, 915,806.94 and 361,821.57 is: 499,314.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,627.57 : 915,806.94 = 361,821.57 : x
  2. Step 2: Convert to fraction form
    663,627.57/915,806.94 = 361,821.57/x
  3. Step 3: Cross multiply
    663,627.57x = 915,806.94 × 361,821.57
  4. Step 4: Simplify right side
    663,627.57x = 331,358,704,847.70
  5. Step 5: Solve for x
    x = 331,358,704,847.70/663,627.57
  6. Step 6: Final answer
    x = 499,314.25

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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.