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Finding the Fourth Proportional to 949.44, 1,423 and 461.40

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Solution

The fourth proportional to 949.44, 1,423 and 461.40 is: 691.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.44 : 1,423 = 461.40 : x
  2. Step 2: Convert to fraction form
    949.44/1,423 = 461.40/x
  3. Step 3: Cross multiply
    949.44x = 1,423 × 461.40
  4. Step 4: Simplify right side
    949.44x = 656,572.20
  5. Step 5: Solve for x
    x = 656,572.20/949.44
  6. Step 6: Final answer
    x = 691.54

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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.