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Finding the Fourth Proportional to 996.03, 1,492.88 and 666.58

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Solution

The fourth proportional to 996.03, 1,492.88 and 666.58 is: 999.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.03 : 1,492.88 = 666.58 : x
  2. Step 2: Convert to fraction form
    996.03/1,492.88 = 666.58/x
  3. Step 3: Cross multiply
    996.03x = 1,492.88 × 666.58
  4. Step 4: Simplify right side
    996.03x = 995,123.95
  5. Step 5: Solve for x
    x = 995,123.95/996.03
  6. Step 6: Final answer
    x = 999.09

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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.