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Finding the Fourth Proportional to 995.70, 1,493.10 and 447.60

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Solution

The fourth proportional to 995.70, 1,493.10 and 447.60 is: 671.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.70 : 1,493.10 = 447.60 : x
  2. Step 2: Convert to fraction form
    995.70/1,493.10 = 447.60/x
  3. Step 3: Cross multiply
    995.70x = 1,493.10 × 447.60
  4. Step 4: Simplify right side
    995.70x = 668,311.56
  5. Step 5: Solve for x
    x = 668,311.56/995.70
  6. Step 6: Final answer
    x = 671.20

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1.5x scale

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.