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Finding the Fourth Proportional to 995.60, 1,493.58 and 447.80

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Solution

The fourth proportional to 995.60, 1,493.58 and 447.80 is: 671.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.60 : 1,493.58 = 447.80 : x
  2. Step 2: Convert to fraction form
    995.60/1,493.58 = 447.80/x
  3. Step 3: Cross multiply
    995.60x = 1,493.58 × 447.80
  4. Step 4: Simplify right side
    995.60x = 668,825.12
  5. Step 5: Solve for x
    x = 668,825.12/995.60
  6. Step 6: Final answer
    x = 671.78

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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.