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Finding the Fourth Proportional to 999.12, 1,498.68 and 451.14

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Solution

The fourth proportional to 999.12, 1,498.68 and 451.14 is: 676.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.12 : 1,498.68 = 451.14 : x
  2. Step 2: Convert to fraction form
    999.12/1,498.68 = 451.14/x
  3. Step 3: Cross multiply
    999.12x = 1,498.68 × 451.14
  4. Step 4: Simplify right side
    999.12x = 676,114.50
  5. Step 5: Solve for x
    x = 676,114.50/999.12
  6. Step 6: Final answer
    x = 676.71

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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.