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Finding the Fourth Proportional to 995.94, 1,492.74 and 447.48

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Solution

The fourth proportional to 995.94, 1,492.74 and 447.48 is: 670.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.94 : 1,492.74 = 447.48 : x
  2. Step 2: Convert to fraction form
    995.94/1,492.74 = 447.48/x
  3. Step 3: Cross multiply
    995.94x = 1,492.74 × 447.48
  4. Step 4: Simplify right side
    995.94x = 667,971.30
  5. Step 5: Solve for x
    x = 667,971.30/995.94
  6. Step 6: Final answer
    x = 670.69

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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.