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Finding the Fourth Proportional to 949.92, 1,423.20 and 675.60

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Solution

The fourth proportional to 949.92, 1,423.20 and 675.60 is: 1,012.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.92 : 1,423.20 = 675.60 : x
  2. Step 2: Convert to fraction form
    949.92/1,423.20 = 675.60/x
  3. Step 3: Cross multiply
    949.92x = 1,423.20 × 675.60
  4. Step 4: Simplify right side
    949.92x = 961,513.92
  5. Step 5: Solve for x
    x = 961,513.92/949.92
  6. Step 6: Final answer
    x = 1,012.21

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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.