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Finding the Fourth Proportional to 999.12, 1,498.69 and 349.87

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Solution

The fourth proportional to 999.12, 1,498.69 and 349.87 is: 524.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.12 : 1,498.69 = 349.87 : x
  2. Step 2: Convert to fraction form
    999.12/1,498.69 = 349.87/x
  3. Step 3: Cross multiply
    999.12x = 1,498.69 × 349.87
  4. Step 4: Simplify right side
    999.12x = 524,346.67
  5. Step 5: Solve for x
    x = 524,346.67/999.12
  6. Step 6: Final answer
    x = 524.81

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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.