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Finding the Fourth Proportional to 455,435.40, 683,153.10 and 449,214.60

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Solution

The fourth proportional to 455,435.40, 683,153.10 and 449,214.60 is: 673,821.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,435.40 : 683,153.10 = 449,214.60 : x
  2. Step 2: Convert to fraction form
    455,435.40/683,153.10 = 449,214.60/x
  3. Step 3: Cross multiply
    455,435.40x = 683,153.10 × 449,214.60
  4. Step 4: Simplify right side
    455,435.40x = 306,882,346,555.26
  5. Step 5: Solve for x
    x = 306,882,346,555.26/455,435.40
  6. Step 6: Final answer
    x = 673,821.90

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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.