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Finding the Fourth Proportional to 995.58, 1,492.96 and 447.61

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Solution

The fourth proportional to 995.58, 1,492.96 and 447.61 is: 671.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.58 : 1,492.96 = 447.61 : x
  2. Step 2: Convert to fraction form
    995.58/1,492.96 = 447.61/x
  3. Step 3: Cross multiply
    995.58x = 1,492.96 × 447.61
  4. Step 4: Simplify right side
    995.58x = 668,262.71
  5. Step 5: Solve for x
    x = 668,262.71/995.58
  6. Step 6: Final answer
    x = 671.23

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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.