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Finding the Fourth Proportional to 1,472.45, 2,209.03 and 499.28

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Solution

The fourth proportional to 1,472.45, 2,209.03 and 499.28 is: 749.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,472.45 : 2,209.03 = 499.28 : x
  2. Step 2: Convert to fraction form
    1,472.45/2,209.03 = 499.28/x
  3. Step 3: Cross multiply
    1,472.45x = 2,209.03 × 499.28
  4. Step 4: Simplify right side
    1,472.45x = 1,102,912.21
  5. Step 5: Solve for x
    x = 1,102,912.21/1,472.45
  6. Step 6: Final answer
    x = 749.03

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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.