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Finding the Fourth Proportional to 455,428.40, 683,142.60 and 449,207.60

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Solution

The fourth proportional to 455,428.40, 683,142.60 and 449,207.60 is: 673,811.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,428.40 : 683,142.60 = 449,207.60 : x
  2. Step 2: Convert to fraction form
    455,428.40/683,142.60 = 449,207.60/x
  3. Step 3: Cross multiply
    455,428.40x = 683,142.60 × 449,207.60
  4. Step 4: Simplify right side
    455,428.40x = 306,872,847,803.76
  5. Step 5: Solve for x
    x = 306,872,847,803.76/455,428.40
  6. Step 6: Final answer
    x = 673,811.40

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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.