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Finding the Fourth Proportional to 949.96, 1,423.97 and 455.64

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Solution

The fourth proportional to 949.96, 1,423.97 and 455.64 is: 683.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.96 : 1,423.97 = 455.64 : x
  2. Step 2: Convert to fraction form
    949.96/1,423.97 = 455.64/x
  3. Step 3: Cross multiply
    949.96x = 1,423.97 × 455.64
  4. Step 4: Simplify right side
    949.96x = 648,816.03
  5. Step 5: Solve for x
    x = 648,816.03/949.96
  6. Step 6: Final answer
    x = 683.00

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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.