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Finding the Fourth Proportional to 999.28, 1,499.02 and 383.50

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Solution

The fourth proportional to 999.28, 1,499.02 and 383.50 is: 575.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.28 : 1,499.02 = 383.50 : x
  2. Step 2: Convert to fraction form
    999.28/1,499.02 = 383.50/x
  3. Step 3: Cross multiply
    999.28x = 1,499.02 × 383.50
  4. Step 4: Simplify right side
    999.28x = 574,872.25
  5. Step 5: Solve for x
    x = 574,872.25/999.28
  6. Step 6: Final answer
    x = 575.29

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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.