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Finding the Fourth Proportional to 949.60, 1,422.12 and 674.40

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Solution

The fourth proportional to 949.60, 1,422.12 and 674.40 is: 1,009.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.60 : 1,422.12 = 674.40 : x
  2. Step 2: Convert to fraction form
    949.60/1,422.12 = 674.40/x
  3. Step 3: Cross multiply
    949.60x = 1,422.12 × 674.40
  4. Step 4: Simplify right side
    949.60x = 959,085.59
  5. Step 5: Solve for x
    x = 959,085.59/949.60
  6. Step 6: Final answer
    x = 1,009.99

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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.