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Finding the Fourth Proportional to 1,299.22, 1,949.04 and 477.88

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Solution

The fourth proportional to 1,299.22, 1,949.04 and 477.88 is: 716.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.22 : 1,949.04 = 477.88 : x
  2. Step 2: Convert to fraction form
    1,299.22/1,949.04 = 477.88/x
  3. Step 3: Cross multiply
    1,299.22x = 1,949.04 × 477.88
  4. Step 4: Simplify right side
    1,299.22x = 931,407.24
  5. Step 5: Solve for x
    x = 931,407.24/1,299.22
  6. Step 6: Final answer
    x = 716.90

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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.