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Finding the Fourth Proportional to 999.45, 1,499.19 and 383.19

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Solution

The fourth proportional to 999.45, 1,499.19 and 383.19 is: 574.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.45 : 1,499.19 = 383.19 : x
  2. Step 2: Convert to fraction form
    999.45/1,499.19 = 383.19/x
  3. Step 3: Cross multiply
    999.45x = 1,499.19 × 383.19
  4. Step 4: Simplify right side
    999.45x = 574,474.62
  5. Step 5: Solve for x
    x = 574,474.62/999.45
  6. Step 6: Final answer
    x = 574.79

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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.