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Finding the Fourth Proportional to 995.51, 1,493.89 and 447.71

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Solution

The fourth proportional to 995.51, 1,493.89 and 447.71 is: 671.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.51 : 1,493.89 = 447.71 : x
  2. Step 2: Convert to fraction form
    995.51/1,493.89 = 447.71/x
  3. Step 3: Cross multiply
    995.51x = 1,493.89 × 447.71
  4. Step 4: Simplify right side
    995.51x = 668,820.90
  5. Step 5: Solve for x
    x = 668,820.90/995.51
  6. Step 6: Final answer
    x = 671.84

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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.